80957980 has 24 divisors (see below), whose sum is σ = 172801440. Its totient is φ = 31851840.

The previous prime is 80957911. The next prime is 80957983. The reversal of 80957980 is 8975908.

It is a self number, because there is not a number n which added to its sum of digits gives 80957980.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80957983) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31960 + ... + 34399.

It is an arithmetic number, because the mean of its divisors is an integer number (7200060).

Almost surely, 2^80957980 is an apocalyptic number.

It is an amenable number.

80957980 is an abundant number, since it is smaller than the sum of its proper divisors (91843460).

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

80957980 is a wasteful number, since it uses less digits than its factorization.

80957980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66429 (or 66427 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 46.

The square root of 80957980 is about 8997.6652527197. The cubic root of 80957980 is about 432.6000392285.

The spelling of 80957980 in words is "eighty million, nine hundred fifty-seven thousand, nine hundred eighty".