31995872 has 24 divisors (see below), whose sum is σ = 63495936. Its totient is φ = 15869952.

The previous prime is 31995871. The next prime is 31995881. The reversal of 31995872 is 27859913.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31995871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 128 + ... + 8000.

It is an arithmetic number, because the mean of its divisors is an integer number (2645664).

Almost surely, 2^31995872 is an apocalyptic number.

31995872 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

31995872 is a deficient number, since it is larger than the sum of its proper divisors (31500064).

31995872 is a wasteful number, since it uses less digits than its factorization.

31995872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8010 (or 8002 counting only the distinct ones).

The product of its digits is 136080, while the sum is 44.

The square root of 31995872 is about 5656.4893706256. The cubic root of 31995872 is about 317.4665581575.

The spelling of 31995872 in words is "thirty-one million, nine hundred ninety-five thousand, eight hundred seventy-two".