31485960 has 96 divisors (see below), whose sum is σ = 111646080. Its totient is φ = 7632000.

The previous prime is 31485959. The next prime is 31485973. The reversal of 31485960 is 6958413.

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 23 ways as a sum of consecutive naturals, for example, 16 + ... + 7935.

It is an arithmetic number, because the mean of its divisors is an integer number (1162980).

Almost surely, 2^31485960 is an apocalyptic number.

31485960 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 31485960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55823040).

31485960 is an abundant number, since it is smaller than the sum of its proper divisors (80160120).

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

31485960 is a wasteful number, since it uses less digits than its factorization.

31485960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7979 (or 7972 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 31485960 is about 5611.2351581448. The cubic root of 31485960 is about 315.7710513815.

The spelling of 31485960 in words is "thirty-one million, four hundred eighty-five thousand, nine hundred sixty".