78580978 has 8 divisors (see below), whose sum is σ = 134710272. Its totient is φ = 33677556.

The previous prime is 78580951. The next prime is 78581011. The reversal of 78580978 is 87908587.

It is a sphenic number, since it is the product of 3 distinct primes.

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, 2806450 + ... + 2806477.

It is an arithmetic number, because the mean of its divisors is an integer number (16838784).

Almost surely, 2^78580978 is an apocalyptic number.

78580978 is a deficient number, since it is larger than the sum of its proper divisors (56129294).

78580978 is a wasteful number, since it uses less digits than its factorization.

78580978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5612936.

The product of its (nonzero) digits is 1128960, while the sum is 52.

The square root of 78580978 is about 8864.5912483318. The cubic root of 78580978 is about 428.3240660062.

The spelling of 78580978 in words is "seventy-eight million, five hundred eighty thousand, nine hundred seventy-eight".