78558980 has 24 divisors (see below), whose sum is σ = 165141312. Its totient is φ = 31391712.

The previous prime is 78558973. The next prime is 78559003. The reversal of 78558980 is 8985587.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34559 + ... + 36761.

It is an arithmetic number, because the mean of its divisors is an integer number (6880888).

Almost surely, 2^78558980 is an apocalyptic number.

It is an amenable number.

78558980 is an abundant number, since it is smaller than the sum of its proper divisors (86582332).

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

78558980 is a wasteful number, since it uses less digits than its factorization.

78558980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3995 (or 3993 counting only the distinct ones).

The product of its (nonzero) digits is 806400, while the sum is 50.

The square root of 78558980 is about 8863.3503823329. The cubic root of 78558980 is about 428.2840938552.

The spelling of 78558980 in words is "seventy-eight million, five hundred fifty-eight thousand, nine hundred eighty".