31797996 has 24 divisors (see below), whose sum is σ = 74341680. Its totient is φ = 10578432.

The previous prime is 31797979. The next prime is 31798037. The reversal of 31797996 is 69979713.

It is a super-2 number, since 2×31797996² = 2022225099232032, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4500 + ... + 9156.

It is an arithmetic number, because the mean of its divisors is an integer number (3097570).

Almost surely, 2^31797996 is an apocalyptic number.

It is an amenable number.

31797996 is an abundant number, since it is smaller than the sum of its proper divisors (42543684).

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

31797996 is a wasteful number, since it uses less digits than its factorization.

31797996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5233 (or 5231 counting only the distinct ones).

The product of its digits is 642978, while the sum is 51.

The square root of 31797996 is about 5638.9711827602. The cubic root of 31797996 is about 316.8107552338.

It can be divided in two parts, 3179 and 7996, that added together give a triangular number (11175 = T₁₄₉).

The spelling of 31797996 in words is "thirty-one million, seven hundred ninety-seven thousand, nine hundred ninety-six".