31297296 has 40 divisors (see below), whose sum is σ = 84369600. Its totient is φ = 9978496.

The previous prime is 31297267. The next prime is 31297339. The reversal of 31297296 is 69279213.

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, 13071 + ... + 15278.

It is an arithmetic number, because the mean of its divisors is an integer number (2109240).

Almost surely, 2^31297296 is an apocalyptic number.

It is an amenable number.

31297296 is an abundant number, since it is smaller than the sum of its proper divisors (53072304).

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

31297296 is a wasteful number, since it uses less digits than its factorization.

31297296 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28383 (or 28377 counting only the distinct ones).

The product of its digits is 40824, while the sum is 39.

The square root of 31297296 is about 5594.3986271985. The cubic root of 31297296 is about 315.1390869778.

The spelling of 31297296 in words is "thirty-one million, two hundred ninety-seven thousand, two hundred ninety-six".