79221072 has 80 divisors (see below), whose sum is σ = 235734912. Its totient is φ = 22456320.

The previous prime is 79221059. The next prime is 79221073. The reversal of 79221072 is 27012297.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79221073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45172 + ... + 46892.

Almost surely, 2^79221072 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 79221072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (117867456).

79221072 is an abundant number, since it is smaller than the sum of its proper divisors (156513840).

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

79221072 is a wasteful number, since it uses less digits than its factorization.

79221072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1876 (or 1870 counting only the distinct ones).

The product of its (nonzero) digits is 3528, while the sum is 30.

The square root of 79221072 is about 8900.6220007368. The cubic root of 79221072 is about 429.4839166328.

The spelling of 79221072 in words is "seventy-nine million, two hundred twenty-one thousand, seventy-two".