31870672 has 40 divisors (see below), whose sum is σ = 63370944. Its totient is φ = 15523584.

The previous prime is 31870667. The next prime is 31870673. The reversal of 31870672 is 27607813.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31870673) 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 7 ways as a sum of consecutive naturals, for example, 136668 + ... + 136900.

Almost surely, 2^31870672 is an apocalyptic number.

It is an amenable number.

31870672 is a deficient number, since it is larger than the sum of its proper divisors (31500272).

31870672 is a wasteful number, since it uses less digits than its factorization.

31870672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 427 (or 421 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 34.

The square root of 31870672 is about 5645.4115881838. The cubic root of 31870672 is about 317.0519341582.

The spelling of 31870672 in words is "thirty-one million, eight hundred seventy thousand, six hundred seventy-two".