79506978 has 16 divisors (see below), whose sum is σ = 159104640. Its totient is φ = 26487216.

The previous prime is 79506961. The next prime is 79506979. The reversal of 79506978 is 87960597.

It is a self number, because there is not a number n which added to its sum of digits gives 79506978.

It is not an unprimeable number, because it can be changed into a prime (79506979) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 14208 + ... + 18996.

It is an arithmetic number, because the mean of its divisors is an integer number (9944040).

Almost surely, 2^79506978 is an apocalyptic number.

79506978 is an abundant number, since it is smaller than the sum of its proper divisors (79597662).

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

79506978 is a wasteful number, since it uses less digits than its factorization.

79506978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7561.

The product of its (nonzero) digits is 952560, while the sum is 51.

The square root of 79506978 is about 8916.6685482864. The cubic root of 79506978 is about 429.9999603389. Note that the first 4 decimals are identical.

The spelling of 79506978 in words is "seventy-nine million, five hundred six thousand, nine hundred seventy-eight".