76531980 has 96 divisors (see below), whose sum is σ = 250177536. Its totient is φ = 17116416.

The previous prime is 76531969. The next prime is 76531991. The reversal of 76531980 is 8913567.

It is an interprime number because it is at equal distance from previous prime (76531969) and next prime (76531991).

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, 17802 + ... + 21678.

It is an arithmetic number, because the mean of its divisors is an integer number (2606016).

Almost surely, 2^76531980 is an apocalyptic number.

76531980 is a gapful number since it is divisible by the number (70) 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 76531980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (125088768).

76531980 is an abundant number, since it is smaller than the sum of its proper divisors (173645556).

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

76531980 is a wasteful number, since it uses less digits than its factorization.

76531980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3943 (or 3941 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 39.

The square root of 76531980 is about 8748.2558261633. The cubic root of 76531980 is about 424.5683830340.

The spelling of 76531980 in words is "seventy-six million, five hundred thirty-one thousand, nine hundred eighty".