79322778 has 12 divisors (see below), whose sum is σ = 171866058. Its totient is φ = 26440920.

The previous prime is 79322717. The next prime is 79322819. The reversal of 79322778 is 87722397.

It can be written as a sum of positive squares in only one way, i.e., 68013009 + 11309769 = 8247^2 + 3363^2 .

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, 2203393 + ... + 2203428.

Almost surely, 2^79322778 is an apocalyptic number.

79322778 is an abundant number, since it is smaller than the sum of its proper divisors (92543280).

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

79322778 is a wasteful number, since it uses less digits than its factorization.

79322778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4406829 (or 4406826 counting only the distinct ones).

The product of its digits is 296352, while the sum is 45.

The square root of 79322778 is about 8906.3335890814. Note that the first 3 decimals coincide. The cubic root of 79322778 is about 429.6676321119.

The spelling of 79322778 in words is "seventy-nine million, three hundred twenty-two thousand, seven hundred seventy-eight".