78966368 has 24 divisors (see below), whose sum is σ = 167424768. Its totient is φ = 36445824.

The previous prime is 78966359. The next prime is 78966379. The reversal of 78966368 is 86366987.

It is a super-5 number, since 5×78966368⁵ (a number of 41 digits) contains 55555 as substring. Note that it is a super-d number also for d = 2.

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, 94496 + ... + 95327.

It is an arithmetic number, because the mean of its divisors is an integer number (6976032).

Almost surely, 2^78966368 is an apocalyptic number.

It is an amenable number.

78966368 is an abundant number, since it is smaller than the sum of its proper divisors (88458400).

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

78966368 is a wasteful number, since it uses less digits than its factorization.

78966368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189846 (or 189838 counting only the distinct ones).

The product of its digits is 2612736, while the sum is 53.

The square root of 78966368 is about 8886.3022680978. The cubic root of 78966368 is about 429.0231439564.

The spelling of 78966368 in words is "seventy-eight million, nine hundred sixty-six thousand, three hundred sixty-eight".