78569772 has 24 divisors (see below), whose sum is σ = 187594176. Its totient is φ = 25580688.

The previous prime is 78569753. The next prime is 78569773. The reversal of 78569772 is 27796587.

It is not an unprimeable number, because it can be changed into a prime (78569773) by changing a digit.

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, 75618 + ... + 76649.

It is an arithmetic number, because the mean of its divisors is an integer number (7816424).

Almost surely, 2^78569772 is an apocalyptic number.

It is an amenable number.

78569772 is an abundant number, since it is smaller than the sum of its proper divisors (109024404).

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

78569772 is a wasteful number, since it uses less digits than its factorization.

78569772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152317 (or 152315 counting only the distinct ones).

The product of its digits is 1481760, while the sum is 51.

The square root of 78569772 is about 8863.9591605557. The cubic root of 78569772 is about 428.3037047272.

The spelling of 78569772 in words is "seventy-eight million, five hundred sixty-nine thousand, seven hundred seventy-two".