31908668 has 18 divisors (see below), whose sum is σ = 61378968. Its totient is φ = 14503720.

The previous prime is 31908649. The next prime is 31908697. The reversal of 31908668 is 86680913.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 32480 + ... + 33447.

Almost surely, 2^31908668 is an apocalyptic number.

It is an amenable number.

31908668 is a deficient number, since it is larger than the sum of its proper divisors (29470300).

31908668 is a wasteful number, since it uses less digits than its factorization.

31908668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65953 (or 65940 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 41.

The square root of 31908668 is about 5648.7757965775. The cubic root of 31908668 is about 317.1778798461.

The spelling of 31908668 in words is "thirty-one million, nine hundred eight thousand, six hundred sixty-eight".