31357968 has 40 divisors (see below), whose sum is σ = 81209088. Its totient is φ = 10426752.

The previous prime is 31357967. The next prime is 31358009. The reversal of 31357968 is 86975313.

It is not an unprimeable number, because it can be changed into a prime (31357967) 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, 35905 + ... + 36767.

Almost surely, 2^31357968 is an apocalyptic number.

It is an amenable number.

31357968 is an abundant number, since it is smaller than the sum of its proper divisors (49851120).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31357968 is a wasteful number, since it uses less digits than its factorization.

31357968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1631 (or 1625 counting only the distinct ones).

The product of its digits is 136080, while the sum is 42.

The square root of 31357968 is about 5599.8185684895. The cubic root of 31357968 is about 315.3425952590.

The spelling of 31357968 in words is "thirty-one million, three hundred fifty-seven thousand, nine hundred sixty-eight".