80993980 has 24 divisors (see below), whose sum is σ = 170528400. Its totient is φ = 32313600.

The previous prime is 80993977. The next prime is 80993987. The reversal of 80993980 is 8939908.

It is a self number, because there is not a number n which added to its sum of digits gives 80993980.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80993987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2971 + ... + 13069.

It is an arithmetic number, because the mean of its divisors is an integer number (7105350).

Almost surely, 2^80993980 is an apocalyptic number.

It is an amenable number.

80993980 is an abundant number, since it is smaller than the sum of its proper divisors (89534420).

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

80993980 is a wasteful number, since it uses less digits than its factorization.

80993980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10509 (or 10507 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 46.

The square root of 80993980 is about 8999.6655493413. The cubic root of 80993980 is about 432.6641518854.

The spelling of 80993980 in words is "eighty million, nine hundred ninety-three thousand, nine hundred eighty".