31797900 has 72 divisors (see below), whose sum is σ = 102233040. Its totient is φ = 8478720.

The previous prime is 31797889. The next prime is 31797901. The reversal of 31797900 is 979713.

It is a super-2 number, since 2×31797900² = 2022212888820000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (31797901) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3189 + ... + 8588.

Almost surely, 2^31797900 is an apocalyptic number.

31797900 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31797900 is an abundant number, since it is smaller than the sum of its proper divisors (70435140).

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

31797900 is a wasteful number, since it uses less digits than its factorization.

31797900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11800 (or 11787 counting only the distinct ones).

The product of its (nonzero) digits is 11907, while the sum is 36.

The square root of 31797900 is about 5638.9626705627. The cubic root of 31797900 is about 316.8104364101.

The spelling of 31797900 in words is "thirty-one million, seven hundred ninety-seven thousand, nine hundred".