31442392 has 16 divisors (see below), whose sum is σ = 59666040. Its totient is φ = 15531456.

The previous prime is 31442381. The next prime is 31442413. The reversal of 31442392 is 29324413.

It is a self number, because there is not a number n which added to its sum of digits gives 31442392.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23013 + ... + 24340.

Almost surely, 2^31442392 is an apocalyptic number.

It is an amenable number.

31442392 is a deficient number, since it is larger than the sum of its proper divisors (28223648).

31442392 is a wasteful number, since it uses less digits than its factorization.

31442392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47442 (or 47438 counting only the distinct ones).

The product of its digits is 5184, while the sum is 28.

The square root of 31442392 is about 5607.3516030297. The cubic root of 31442392 is about 315.6253370842.

The spelling of 31442392 in words is "thirty-one million, four hundred forty-two thousand, three hundred ninety-two".