31442872 has 32 divisors (see below), whose sum is σ = 62370000. Its totient is φ = 14819328.

The previous prime is 31442857. The next prime is 31442893. The reversal of 31442872 is 27824413.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40504 + ... + 41272.

Almost surely, 2^31442872 is an apocalyptic number.

It is an amenable number.

31442872 is a deficient number, since it is larger than the sum of its proper divisors (30927128).

31442872 is a wasteful number, since it uses less digits than its factorization.

31442872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1063 (or 1059 counting only the distinct ones).

The product of its digits is 10752, while the sum is 31.

The square root of 31442872 is about 5607.3944038207. The cubic root of 31442872 is about 315.6269431897.

The spelling of 31442872 in words is "thirty-one million, four hundred forty-two thousand, eight hundred seventy-two".