79101220 has 48 divisors (see below), whose sum is σ = 182383488. Its totient is φ = 28578560.

The previous prime is 79101193. The next prime is 79101223. The reversal of 79101220 is 2210197.

79101220 = T₁₂₁ + T₁₂₂ + ... + T₇₈₀.

It is a super-3 number, since 3×79101220³ (a number of 25 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 79101191 and 79101200.

It is not an unprimeable number, because it can be changed into a prime (79101223) 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, 35664 + ... + 37816.

It is an arithmetic number, because the mean of its divisors is an integer number (3799656).

Almost surely, 2^79101220 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 79101220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91191744).

79101220 is an abundant number, since it is smaller than the sum of its proper divisors (103282268).

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

79101220 is a wasteful number, since it uses less digits than its factorization.

79101220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2340 (or 2338 counting only the distinct ones).

The product of its (nonzero) digits is 252, while the sum is 22.

The square root of 79101220 is about 8893.8866644454. The cubic root of 79101220 is about 429.2672213977.

The spelling of 79101220 in words is "seventy-nine million, one hundred one thousand, two hundred twenty".