31397064 has 32 divisors (see below), whose sum is σ = 79380000. Its totient is φ = 10347392.

The previous prime is 31397039. The next prime is 31397077. The reversal of 31397064 is 46079313.

It is an unprimeable number.

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, 5214 + ... + 9485.

It is an arithmetic number, because the mean of its divisors is an integer number (2480625).

Almost surely, 2^31397064 is an apocalyptic number.

It is an amenable number.

31397064 is an abundant number, since it is smaller than the sum of its proper divisors (47982936).

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

31397064 is a wasteful number, since it uses less digits than its factorization.

31397064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14797 (or 14793 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 33.

The square root of 31397064 is about 5603.3083084906. The cubic root of 31397064 is about 315.4735934794.

The spelling of 31397064 in words is "thirty-one million, three hundred ninety-seven thousand, sixty-four".