31394712 has 32 divisors (see below), whose sum is σ = 79015680. Its totient is φ = 10394400.

The previous prime is 31394711. The next prime is 31394719. The reversal of 31394712 is 21749313.

It is a self number, because there is not a number n which added to its sum of digits gives 31394712.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31394711) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 708 + ... + 7955.

It is an arithmetic number, because the mean of its divisors is an integer number (2469240).

Almost surely, 2^31394712 is an apocalyptic number.

It is an amenable number.

31394712 is an abundant number, since it is smaller than the sum of its proper divisors (47620968).

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

31394712 is a wasteful number, since it uses less digits than its factorization.

31394712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8823 (or 8819 counting only the distinct ones).

The product of its digits is 4536, while the sum is 30.

The square root of 31394712 is about 5603.0984285483. The cubic root of 31394712 is about 315.4657157532.

The spelling of 31394712 in words is "thirty-one million, three hundred ninety-four thousand, seven hundred twelve".