31194912 has 96 divisors (see below), whose sum is σ = 95243904. Its totient is φ = 8755200.

The previous prime is 31194907. The next prime is 31194913. The reversal of 31194912 is 21949113.

It is a tau number, because it is divible by the number of its divisors (96).

It is a self number, because there is not a number n which added to its sum of digits gives 31194912.

It is not an unprimeable number, because it can be changed into a prime (31194913) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40612 + ... + 41372.

It is an arithmetic number, because the mean of its divisors is an integer number (992124).

Almost surely, 2^31194912 is an apocalyptic number.

31194912 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31194912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47621952).

31194912 is an abundant number, since it is smaller than the sum of its proper divisors (64048992).

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

31194912 is a wasteful number, since it uses less digits than its factorization.

31194912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 842 (or 834 counting only the distinct ones).

The product of its digits is 1944, while the sum is 30.

The square root of 31194912 is about 5585.2405498779. The cubic root of 31194912 is about 314.7950695286.

The spelling of 31194912 in words is "thirty-one million, one hundred ninety-four thousand, nine hundred twelve".