79170138 has 48 divisors (see below), whose sum is σ = 176679360. Its totient is φ = 25607232.

The previous prime is 79170103. The next prime is 79170151. The reversal of 79170138 is 83107197.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 180123 + ... + 180561.

It is an arithmetic number, because the mean of its divisors is an integer number (3680820).

Almost surely, 2^79170138 is an apocalyptic number.

79170138 is an abundant number, since it is smaller than the sum of its proper divisors (97509222).

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

79170138 is a wasteful number, since it uses less digits than its factorization.

79170138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 723 (or 720 counting only the distinct ones).

The product of its (nonzero) digits is 10584, while the sum is 36.

The square root of 79170138 is about 8897.7602799806. The cubic root of 79170138 is about 429.3918534857.

The spelling of 79170138 in words is "seventy-nine million, one hundred seventy thousand, one hundred thirty-eight".