79868385 has 24 divisors (see below), whose sum is σ = 142183080. Its totient is φ = 41444352.

The previous prime is 79868377. The next prime is 79868387. The reversal of 79868385 is 58386897.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 32216976 + 47651409 = 5676^2 + 6903^2 .

It is not a de Polignac number, because 79868385 - 2³ = 79868377 is a prime.

It is not an unprimeable number, because it can be changed into a prime (79868387) 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, 22320 + ... + 25649.

It is an arithmetic number, because the mean of its divisors is an integer number (5924295).

Almost surely, 2^79868385 is an apocalyptic number.

It is an amenable number.

79868385 is a deficient number, since it is larger than the sum of its proper divisors (62314695).

79868385 is a wasteful number, since it uses less digits than its factorization.

79868385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48017 (or 48014 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 54.

The square root of 79868385 is about 8936.9113792182. The cubic root of 79868385 is about 430.6505117023.

The spelling of 79868385 in words is "seventy-nine million, eight hundred sixty-eight thousand, three hundred eighty-five".