79138816 has 39 divisors (see below), whose sum is σ = 159405051. Its totient is φ = 39284736.

The previous prime is 79138799. The next prime is 79138823. The reversal of 79138816 is 61883197.

The square root of 79138816 is 8896.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 569275 + ... + 569413.

It is an arithmetic number, because the mean of its divisors is an integer number (4087309).

Almost surely, 2^79138816 is an apocalyptic number.

79138816 is the 8896-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 79138816

79138816 is an abundant number, since it is smaller than the sum of its proper divisors (80266235).

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

79138816 is an frugal number, since it uses more digits than its factorization.

79138816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302 (or 141 counting only the distinct ones).

The product of its digits is 72576, while the sum is 43.

The cubic root of 79138816 is about 429.3352193977.

The spelling of 79138816 in words is "seventy-nine million, one hundred thirty-eight thousand, eight hundred sixteen".