79940570 has 16 divisors (see below), whose sum is σ = 147403368. Its totient is φ = 31196160.

The previous prime is 79940527. The next prime is 79940573. The reversal of 79940570 is 7504997.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 56505289 + 23435281 = 7517^2 + 4841^2 .

It is a Harshad number since it is a multiple of its sum of digits (41).

It is not an unprimeable number, because it can be changed into a prime (79940573) 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, 97079 + ... + 97898.

Almost surely, 2^79940570 is an apocalyptic number.

79940570 is a deficient number, since it is larger than the sum of its proper divisors (67462798).

79940570 is a wasteful number, since it uses less digits than its factorization.

79940570 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195025.

The product of its (nonzero) digits is 79380, while the sum is 41.

The square root of 79940570 is about 8940.9490547704. The cubic root of 79940570 is about 430.7802131963.

The spelling of 79940570 in words is "seventy-nine million, nine hundred forty thousand, five hundred seventy".