79138488 has 64 divisors (see below), whose sum is σ = 232444800. Its totient is φ = 22135680.

The previous prime is 79138481. The next prime is 79138489. The reversal of 79138488 is 88483197.

It is a super-2 number, since 2×79138488² = 12525800565852288, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79138481) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8098 + ... + 14961.

It is an arithmetic number, because the mean of its divisors is an integer number (3631950).

Almost surely, 2^79138488 is an apocalyptic number.

79138488 is a gapful number since it is divisible by the number (78) formed by its first and last digit.

It is an amenable number.

79138488 is an abundant number, since it is smaller than the sum of its proper divisors (153306312).

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

79138488 is a wasteful number, since it uses less digits than its factorization.

79138488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23092 (or 23088 counting only the distinct ones).

The product of its digits is 387072, while the sum is 48.

The square root of 79138488 is about 8895.9815647291. The cubic root of 79138488 is about 429.3346262537.

The spelling of 79138488 in words is "seventy-nine million, one hundred thirty-eight thousand, four hundred eighty-eight".