78768920 has 16 divisors (see below), whose sum is σ = 177230160. Its totient is φ = 31507552.

The previous prime is 78768917. The next prime is 78768961. The reversal of 78768920 is 2986787.

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 3 ways as a sum of consecutive naturals, for example, 984572 + ... + 984651.

It is an arithmetic number, because the mean of its divisors is an integer number (11076885).

Almost surely, 2^78768920 is an apocalyptic number.

It is an amenable number.

78768920 is an abundant number, since it is smaller than the sum of its proper divisors (98461240).

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

78768920 is a wasteful number, since it uses less digits than its factorization.

78768920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1969234 (or 1969230 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 47.

The square root of 78768920 is about 8875.1856318615. The cubic root of 78768920 is about 428.6652681287.

The spelling of 78768920 in words is "seventy-eight million, seven hundred sixty-eight thousand, nine hundred twenty".