79226820 has 72 divisors (see below), whose sum is σ = 243262656. Its totient is φ = 20868672.

The previous prime is 79226779. The next prime is 79226857. The reversal of 79226820 is 2862297.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12289 + ... + 17591.

It is an arithmetic number, because the mean of its divisors is an integer number (3378648).

Almost surely, 2^79226820 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 79226820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (121631328).

79226820 is an abundant number, since it is smaller than the sum of its proper divisors (164035836).

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

79226820 is a wasteful number, since it uses less digits than its factorization.

79226820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5401 (or 5396 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 79226820 is about 8900.9448936616. The cubic root of 79226820 is about 429.4943036582.

The spelling of 79226820 in words is "seventy-nine million, two hundred twenty-six thousand, eight hundred twenty".