79785900 has 54 divisors (see below), whose sum is σ = 250087292. Its totient is φ = 21276000.

The previous prime is 79785899. The next prime is 79785917. The reversal of 79785900 is 958797.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 43426 + ... + 45225.

Almost surely, 2^79785900 is an apocalyptic number.

It is an amenable number.

79785900 is an abundant number, since it is smaller than the sum of its proper divisors (170301392).

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

79785900 is a wasteful number, since it uses less digits than its factorization.

79785900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88671 (or 88661 counting only the distinct ones).

The product of its (nonzero) digits is 158760, while the sum is 45.

The square root of 79785900 is about 8932.2953377058. The cubic root of 79785900 is about 430.5022075344.

The spelling of 79785900 in words is "seventy-nine million, seven hundred eighty-five thousand, nine hundred".