78423684 has 24 divisors (see below), whose sum is σ = 183283968. Its totient is φ = 26099040.

The previous prime is 78423679. The next prime is 78423691. The reversal of 78423684 is 48632487.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2989 + ... + 12875.

It is an arithmetic number, because the mean of its divisors is an integer number (7636832).

Almost surely, 2^78423684 is an apocalyptic number.

It is an amenable number.

78423684 is an abundant number, since it is smaller than the sum of its proper divisors (104860284).

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

78423684 is a wasteful number, since it uses less digits than its factorization.

78423684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10555 (or 10553 counting only the distinct ones).

The product of its digits is 258048, while the sum is 42.

The square root of 78423684 is about 8855.7147650543. The cubic root of 78423684 is about 428.0380858180.

The spelling of 78423684 in words is "seventy-eight million, four hundred twenty-three thousand, six hundred eighty-four".