78996402 has 12 divisors (see below), whose sum is σ = 171158910. Its totient is φ = 26332128.

The previous prime is 78996397. The next prime is 78996419. The reversal of 78996402 is 20469987.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 69205761 + 9790641 = 8319^2 + 3129^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2194327 + ... + 2194362.

Almost surely, 2^78996402 is an apocalyptic number.

78996402 is an abundant number, since it is smaller than the sum of its proper divisors (92162508).

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

78996402 is a wasteful number, since it uses less digits than its factorization.

78996402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4388697 (or 4388694 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The square root of 78996402 is about 8887.9920116976. The cubic root of 78996402 is about 429.0775284924.

The spelling of 78996402 in words is "seventy-eight million, nine hundred ninety-six thousand, four hundred two".