31318980 has 96 divisors (see below), whose sum is σ = 109347840. Its totient is φ = 6506880.

The previous prime is 31318961. The next prime is 31318999. The reversal of 31318980 is 8981313.

It is an interprime number because it is at equal distance from previous prime (31318961) and next prime (31318999).

It is a Harshad number since it is a multiple of its sum of digits (33).

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, 1231 + ... + 8009.

It is an arithmetic number, because the mean of its divisors is an integer number (1139040).

Almost surely, 2^31318980 is an apocalyptic number.

31318980 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 31318980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (54673920).

31318980 is an abundant number, since it is smaller than the sum of its proper divisors (78028860).

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

31318980 is a wasteful number, since it uses less digits than its factorization.

31318980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6809 (or 6807 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 33.

The square root of 31318980 is about 5596.3363015459. The cubic root of 31318980 is about 315.2118504353.

The spelling of 31318980 in words is "thirty-one million, three hundred eighteen thousand, nine hundred eighty".