79647138 has 24 divisors (see below), whose sum is σ = 178961328. Its totient is φ = 26548884.

The previous prime is 79647131. The next prime is 79647173. The reversal of 79647138 is 83174697.

It is a plaindrome in base 13.

It is a junction number, because it is equal to n+sod(n) for n = 79647093 and 79647102.

It is not an unprimeable number, because it can be changed into a prime (79647131) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 81456 + ... + 82427.

It is an arithmetic number, because the mean of its divisors is an integer number (7456722).

Almost surely, 2^79647138 is an apocalyptic number.

79647138 is an abundant number, since it is smaller than the sum of its proper divisors (99314190).

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

79647138 is a wasteful number, since it uses less digits than its factorization.

79647138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163900 (or 163888 counting only the distinct ones).

The product of its digits is 254016, while the sum is 45.

The square root of 79647138 is about 8924.5245251498. The cubic root of 79647138 is about 430.2524891750.

The spelling of 79647138 in words is "seventy-nine million, six hundred forty-seven thousand, one hundred thirty-eight".