78612320 has 24 divisors (see below), whose sum is σ = 185721984. Its totient is φ = 31444864.

The previous prime is 78612319. The next prime is 78612377. The reversal of 78612320 is 2321687.

It is a happy number.

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, 245504 + ... + 245823.

It is an arithmetic number, because the mean of its divisors is an integer number (7738416).

Almost surely, 2^78612320 is an apocalyptic number.

It is an amenable number.

78612320 is an abundant number, since it is smaller than the sum of its proper divisors (107109664).

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

78612320 is a wasteful number, since it uses less digits than its factorization.

78612320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 491342 (or 491334 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 78612320 is about 8866.3588919015. The cubic root of 78612320 is about 428.3810040796.

The spelling of 78612320 in words is "seventy-eight million, six hundred twelve thousand, three hundred twenty".