79979130 has 128 divisors (see below), whose sum is σ = 265973760. Its totient is φ = 16614720.

The previous prime is 79979117. The next prime is 79979131. The reversal of 79979130 is 3197997.

It is a super-2 number, since 2×79979130² = 12793322471113800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (79979131) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 18867 + ... + 22713.

It is an arithmetic number, because the mean of its divisors is an integer number (2077920).

Almost surely, 2^79979130 is an apocalyptic number.

79979130 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 79979130, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (132986880).

79979130 is an abundant number, since it is smaller than the sum of its proper divisors (185994630).

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

79979130 is a wasteful number, since it uses less digits than its factorization.

79979130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3881 (or 3875 counting only the distinct ones).

The product of its (nonzero) digits is 107163, while the sum is 45.

The square root of 79979130 is about 8943.1051654333. The cubic root of 79979130 is about 430.8494655377.

The spelling of 79979130 in words is "seventy-nine million, nine hundred seventy-nine thousand, one hundred thirty".