79530220 has 96 divisors (see below), whose sum is σ = 213244416. Its totient is φ = 24192000.

The previous prime is 79530179. The next prime is 79530223. The reversal of 79530220 is 2203597.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is not an unprimeable number, because it can be changed into a prime (79530223) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 65620 + ... + 66820.

It is an arithmetic number, because the mean of its divisors is an integer number (2221296).

Almost surely, 2^79530220 is an apocalyptic number.

79530220 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 79530220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (106622208).

79530220 is an abundant number, since it is smaller than the sum of its proper divisors (133714196).

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

79530220 is a wasteful number, since it uses less digits than its factorization.

79530220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1271 (or 1269 counting only the distinct ones).

The product of its (nonzero) digits is 3780, while the sum is 28.

The square root of 79530220 is about 8917.9717424984. The cubic root of 79530220 is about 430.0418563907.

The spelling of 79530220 in words is "seventy-nine million, five hundred thirty thousand, two hundred twenty".