79139280 has 160 divisors (see below), whose sum is σ = 276553728. Its totient is φ = 18547200.

The previous prime is 79139273. The next prime is 79139309. The reversal of 79139280 is 8293197.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 81357 + ... + 82323.

Almost surely, 2^79139280 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 79139280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (138276864).

79139280 is an abundant number, since it is smaller than the sum of its proper divisors (197414448).

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

79139280 is a wasteful number, since it uses less digits than its factorization.

79139280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1025 (or 1019 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 39.

The square root of 79139280 is about 8896.0260790985. The cubic root of 79139280 is about 429.3360584767.

The spelling of 79139280 in words is "seventy-nine million, one hundred thirty-nine thousand, two hundred eighty".