31908638332 has 12 divisors (see below), whose sum is σ = 55850644696. Its totient is φ = 15951311280.

The previous prime is 31908638327. The next prime is 31908638357. The reversal of 31908638332 is 23383680913.

It is a super-2 number, since 2×31908638332² (a number of 22 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (46) 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 pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 728019 + ... + 770602.

Almost surely, 2^31908638332 is an apocalyptic number.

It is an amenable number.

31908638332 is a deficient number, since it is larger than the sum of its proper divisors (23942006364).

31908638332 is a wasteful number, since it uses less digits than its factorization.

31908638332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1503948 (or 1503946 counting only the distinct ones).

The product of its (nonzero) digits is 559872, while the sum is 46.

The spelling of 31908638332 in words is "thirty-one billion, nine hundred eight million, six hundred thirty-eight thousand, three hundred thirty-two".