31407980 has 12 divisors (see below), whose sum is σ = 65956800. Its totient is φ = 12563184.

The previous prime is 31407979. The next prime is 31407997. The reversal of 31407980 is 8970413.

It is a super-2 number, since 2×31407980² = 1972922415360800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 785180 + ... + 785219.

It is an arithmetic number, because the mean of its divisors is an integer number (5496400).

Almost surely, 2^31407980 is an apocalyptic number.

It is an amenable number.

31407980 is an abundant number, since it is smaller than the sum of its proper divisors (34548820).

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

31407980 is a wasteful number, since it uses less digits than its factorization.

31407980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1570408 (or 1570406 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 31407980 is about 5604.2822912484. The cubic root of 31407980 is about 315.5101500900.

The spelling of 31407980 in words is "thirty-one million, four hundred seven thousand, nine hundred eighty".