78083978 has 16 divisors (see below), whose sum is σ = 138177024. Its totient is φ = 32384880.

The previous prime is 78083969. The next prime is 78083981. The reversal of 78083978 is 87938087.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 89525 + ... + 90392.

It is an arithmetic number, because the mean of its divisors is an integer number (8636064).

Almost surely, 2^78083978 is an apocalyptic number.

78083978 is a deficient number, since it is larger than the sum of its proper divisors (60093046).

78083978 is a wasteful number, since it uses less digits than its factorization.

78083978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179957.

The product of its (nonzero) digits is 677376, while the sum is 50.

The square root of 78083978 is about 8836.5139053815. The cubic root of 78083978 is about 427.4191504938.

The spelling of 78083978 in words is "seventy-eight million, eighty-three thousand, nine hundred seventy-eight".