78336684 has 36 divisors (see below), whose sum is σ = 198811704. Its totient is φ = 26007552.

The previous prime is 78336679. The next prime is 78336707. The reversal of 78336684 is 48663387.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×78336684² = 12273272120231712, which contains 22 as substring.

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 11 ways as a sum of consecutive naturals, for example, 5019 + ... + 13485.

Almost surely, 2^78336684 is an apocalyptic number.

It is an amenable number.

78336684 is an abundant number, since it is smaller than the sum of its proper divisors (120475020).

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

78336684 is a wasteful number, since it uses less digits than its factorization.

78336684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8734 (or 8729 counting only the distinct ones).

The product of its digits is 580608, while the sum is 45.

The square root of 78336684 is about 8850.8013196546. The cubic root of 78336684 is about 427.8797446527.

The spelling of 78336684 in words is "seventy-eight million, three hundred thirty-six thousand, six hundred eighty-four".