78985780 has 24 divisors (see below), whose sum is σ = 167973120. Its totient is φ = 31193760.

The previous prime is 78985769. The next prime is 78985801. The reversal of 78985780 is 8758987.

It is a congruent number.

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, 23416 + ... + 26575.

It is an arithmetic number, because the mean of its divisors is an integer number (6998880).

Almost surely, 2^78985780 is an apocalyptic number.

It is an amenable number.

78985780 is an abundant number, since it is smaller than the sum of its proper divisors (88987340).

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

78985780 is a wasteful number, since it uses less digits than its factorization.

78985780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50079 (or 50077 counting only the distinct ones).

The product of its (nonzero) digits is 1128960, while the sum is 52.

The square root of 78985780 is about 8887.3944438176. The cubic root of 78985780 is about 429.0582961152.

The spelling of 78985780 in words is "seventy-eight million, nine hundred eighty-five thousand, seven hundred eighty".