31928142 has 24 divisors (see below), whose sum is σ = 67837176. Its totient is φ = 10016128.

The previous prime is 31928137. The next prime is 31928153. The reversal of 31928142 is 24182913.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7473 + ... + 10940.

It is an arithmetic number, because the mean of its divisors is an integer number (2826549).

Almost surely, 2^31928142 is an apocalyptic number.

31928142 is an abundant number, since it is smaller than the sum of its proper divisors (35909034).

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

31928142 is a wasteful number, since it uses less digits than its factorization.

31928142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18452 (or 18435 counting only the distinct ones).

The product of its digits is 3456, while the sum is 30.

The square root of 31928142 is about 5650.4992699761. The cubic root of 31928142 is about 317.2423917408.

The spelling of 31928142 in words is "thirty-one million, nine hundred twenty-eight thousand, one hundred forty-two".