31089960 has 128 divisors (see below), whose sum is σ = 113097600. Its totient is φ = 7534080.

The previous prime is 31089941. The next prime is 31090021. The reversal of 31089960 is 6998013.

It is a super-2 number, since 2×31089960² = 1933171225603200, which contains 22 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10572 + ... + 13188.

It is an arithmetic number, because the mean of its divisors is an integer number (883575).

Almost surely, 2^31089960 is an apocalyptic number.

31089960 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31089960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56548800).

31089960 is an abundant number, since it is smaller than the sum of its proper divisors (82007640).

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

31089960 is a wasteful number, since it uses less digits than its factorization.

31089960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2648 (or 2638 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 31089960 is about 5575.8371568761. The cubic root of 31089960 is about 314.4416412417.

The spelling of 31089960 in words is "thirty-one million, eighty-nine thousand, nine hundred sixty".