78977996 has 12 divisors (see below), whose sum is σ = 138429648. Its totient is φ = 39426672.

The previous prime is 78977957. The next prime is 78978007. The reversal of 78977996 is 69977987.

It is a happy number.

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, 12671 + ... + 17846.

It is an arithmetic number, because the mean of its divisors is an integer number (11535804).

Almost surely, 2^78977996 is an apocalyptic number.

It is an amenable number.

78977996 is a deficient number, since it is larger than the sum of its proper divisors (59451652).

78977996 is a wasteful number, since it uses less digits than its factorization.

78977996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31168 (or 31166 counting only the distinct ones).

The product of its digits is 12002256, while the sum is 62.

The square root of 78977996 is about 8886.9565094019. The cubic root of 78977996 is about 429.0442011752.

Subtracting from 78977996 its reverse (69977987), we obtain a palindrome (9000009).

The spelling of 78977996 in words is "seventy-eight million, nine hundred seventy-seven thousand, nine hundred ninety-six".