31945796 has 12 divisors (see below), whose sum is σ = 56048748. Its totient is φ = 15931872.

The previous prime is 31945757. The next prime is 31945799. The reversal of 31945796 is 69754913.

It can be written as a sum of positive squares in 2 ways, for example, as 13764100 + 18181696 = 3710^2 + 4264^2 .

It is not an unprimeable number, because it can be changed into a prime (31945799) 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 3 ways as a sum of consecutive naturals, for example, 8471 + ... + 11646.

It is an arithmetic number, because the mean of its divisors is an integer number (4670729).

Almost surely, 2^31945796 is an apocalyptic number.

It is an amenable number.

31945796 is a deficient number, since it is larger than the sum of its proper divisors (24102952).

31945796 is a wasteful number, since it uses less digits than its factorization.

31945796 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20518 (or 20516 counting only the distinct ones).

The product of its digits is 204120, while the sum is 44.

The square root of 31945796 is about 5652.0612169367. The cubic root of 31945796 is about 317.3008518214.

The spelling of 31945796 in words is "thirty-one million, nine hundred forty-five thousand, seven hundred ninety-six".