78978514 has 16 divisors (see below), whose sum is σ = 122538240. Its totient is φ = 38137680.

The previous prime is 78978509. The next prime is 78978541. The reversal of 78978514 is 41587987.

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, 39892 + ... + 41824.

It is an arithmetic number, because the mean of its divisors is an integer number (7658640).

Almost surely, 2^78978514 is an apocalyptic number.

78978514 is a deficient number, since it is larger than the sum of its proper divisors (43559726).

78978514 is a wasteful number, since it uses less digits than its factorization.

78978514 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2625.

The product of its digits is 564480, while the sum is 49.

The square root of 78978514 is about 8886.9856531897. The cubic root of 78978514 is about 429.0451391766.

The spelling of 78978514 in words is "seventy-eight million, nine hundred seventy-eight thousand, five hundred fourteen".