79938880 has 112 divisors (see below), whose sum is σ = 220041216. Its totient is φ = 27095040.

The previous prime is 79938851. The next prime is 79938883. The reversal of 79938880 is 8883997.

It is a tau number, because it is divible by the number of its divisors (112).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79938883) 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, 284340 + ... + 284620.

Almost surely, 2^79938880 is an apocalyptic number.

79938880 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 79938880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (110020608).

79938880 is an abundant number, since it is smaller than the sum of its proper divisors (140102336).

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

79938880 is a wasteful number, since it uses less digits than its factorization.

79938880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 432 (or 422 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 52.

The square root of 79938880 is about 8940.8545452882. The cubic root of 79938880 is about 430.7771775091. Note that the first 3 decimals are identical.

The spelling of 79938880 in words is "seventy-nine million, nine hundred thirty-eight thousand, eight hundred eighty".