79432690 has 16 divisors (see below), whose sum is σ = 145677528. Its totient is φ = 31173376.

The previous prime is 79432681. The next prime is 79432693. The reversal of 79432690 is 9623497.

It can be written as a sum of positive squares in 4 ways, for example, as 76720081 + 2712609 = 8759^2 + 1647^2 .

It is a super-2 number, since 2×79432690² = 12619104481272200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (79432693) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74407 + ... + 75466.

Almost surely, 2^79432690 is an apocalyptic number.

79432690 is a deficient number, since it is larger than the sum of its proper divisors (66244838).

79432690 is a wasteful number, since it uses less digits than its factorization.

79432690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149933.

The product of its (nonzero) digits is 81648, while the sum is 40.

The square root of 79432690 is about 8912.5018934079. The cubic root of 79432690 is about 429.8659939374.

The spelling of 79432690 in words is "seventy-nine million, four hundred thirty-two thousand, six hundred ninety".