• 912 can be written using four 4's:

912 has 20 divisors (see below), whose sum is σ = 2480. Its totient is φ = 288.

The previous prime is 911. The next prime is 919. The reversal of 912 is 219.

It is a happy number.

912 is nontrivially palindromic in base 7.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a plaindrome in base 9.

It is a nialpdrome in base 4, base 12 and base 13.

It is not an unprimeable number, because it can be changed into a prime (911) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39 + ... + 57.

It is an arithmetic number, because the mean of its divisors is an integer number (124).

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1240).

912 is an abundant number, since it is smaller than the sum of its proper divisors (1568).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

912 is a wasteful number, since it uses less digits than its factorization.

912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30 (or 24 counting only the distinct ones).

The product of its digits is 18, while the sum is 12.

The square root of 912 is about 30.1993377411. The cubic root of 912 is about 9.6976151717.

Subtracting from 912 its sum of digits (12), we obtain a square (900 = 30^{2}).

It can be divided in two parts, 9 and 12, that added together give a triangular number (21 = T_{6}).

The spelling of 912 in words is "nine hundred twelve", and thus it is an aban number and an oban number.

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