79563690 has 48 divisors (see below), whose sum is σ = 212465448. Its totient is φ = 20642688.

The previous prime is 79563677. The next prime is 79563691. The reversal of 79563690 is 9636597.

79563690 is a `hidden beast` number, since 7 + 9 + 5 + 636 + 9 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 79548561 + 15129 = 8919^2 + 123^2 .

It is a super-2 number, since 2×79563690² = 12660761532832200, which contains 22 as substring.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

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

It is not an unprimeable number, because it can be changed into a prime (79563691) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8617 + ... + 15276.

Almost surely, 2^79563690 is an apocalyptic number.

79563690 is an abundant number, since it is smaller than the sum of its proper divisors (132901758).

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

79563690 is a wasteful number, since it uses less digits than its factorization.

79563690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23943 (or 23940 counting only the distinct ones).

The product of its (nonzero) digits is 306180, while the sum is 45.

The square root of 79563690 is about 8919.8480928769. The cubic root of 79563690 is about 430.1021751066.

The spelling of 79563690 in words is "seventy-nine million, five hundred sixty-three thousand, six hundred ninety".