79864900 has 18 divisors (see below), whose sum is σ = 173307050. Its totient is φ = 31945920.

The previous prime is 79864879. The next prime is 79864933. The reversal of 79864900 is 946897.

It can be written as a sum of positive squares in 3 ways, for example, as 10342656 + 69522244 = 3216^2 + 8338^2 .

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, 399225 + ... + 399424.

Almost surely, 2^79864900 is an apocalyptic number.

It is an amenable number.

79864900 is an abundant number, since it is smaller than the sum of its proper divisors (93442150).

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

79864900 is a wasteful number, since it uses less digits than its factorization.

79864900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 798663 (or 798656 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 43.

The square root of 79864900 is about 8936.7163992151. The cubic root of 79864900 is about 430.6442479019.

The spelling of 79864900 in words is "seventy-nine million, eight hundred sixty-four thousand, nine hundred".