31798868 has 12 divisors (see below), whose sum is σ = 55705440. Its totient is φ = 15883032.

The previous prime is 31798861. The next prime is 31798889. The reversal of 31798868 is 86889713.

It is a happy number.

It is a super-2 number, since 2×31798868² = 2022336012162848, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31798861) 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, 953 + ... + 8031.

It is an arithmetic number, because the mean of its divisors is an integer number (4642120).

Almost surely, 2^31798868 is an apocalyptic number.

It is an amenable number.

31798868 is a deficient number, since it is larger than the sum of its proper divisors (23906572).

31798868 is a wasteful number, since it uses less digits than its factorization.

31798868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8206 (or 8204 counting only the distinct ones).

The product of its digits is 580608, while the sum is 50.

The square root of 31798868 is about 5639.0485012988. The cubic root of 31798868 is about 316.8136511862.

The spelling of 31798868 in words is "thirty-one million, seven hundred ninety-eight thousand, eight hundred sixty-eight".