78364684 has 12 divisors (see below), whose sum is σ = 137265408. Its totient is φ = 39146000.

The previous prime is 78364673. The next prime is 78364691. The reversal of 78364684 is 48646387.

It is a super-2 number, since 2×78364684² = 12282047396839712, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3907 + ... + 13114.

It is an arithmetic number, because the mean of its divisors is an integer number (11438784).

Almost surely, 2^78364684 is an apocalyptic number.

It is an amenable number.

78364684 is a deficient number, since it is larger than the sum of its proper divisors (58900724).

78364684 is a wasteful number, since it uses less digits than its factorization.

78364684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18176 (or 18174 counting only the distinct ones).

The product of its digits is 774144, while the sum is 46.

The square root of 78364684 is about 8852.3829560181. The cubic root of 78364684 is about 427.9307178158.

The spelling of 78364684 in words is "seventy-eight million, three hundred sixty-four thousand, six hundred eighty-four".