79442220 has 192 divisors, whose sum is σ = 268240896. Its totient is φ = 17310720.

The previous prime is 79442179. The next prime is 79442221. The reversal of 79442220 is 2224497.

It is a super-3 number, since 3×79442220³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (79442221) 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, 403162 + ... + 403358.

It is an arithmetic number, because the mean of its divisors is an integer number (1397088).

Almost surely, 2^79442220 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 79442220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (134120448).

79442220 is an abundant number, since it is smaller than the sum of its proper divisors (188798676).

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

79442220 is a wasteful number, since it uses less digits than its factorization.

79442220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280 (or 278 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 30.

The square root of 79442220 is about 8913.0365196155. The cubic root of 79442220 is about 429.8831844211.

The spelling of 79442220 in words is "seventy-nine million, four hundred forty-two thousand, two hundred twenty".