79361820 has 72 divisors (see below), whose sum is σ = 243821760. Its totient is φ = 20891520.

The previous prime is 79361801. The next prime is 79361827. The reversal of 79361820 is 2816397.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79361827) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11430 + ... + 17010.

Almost surely, 2^79361820 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 79361820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (121910880).

79361820 is an abundant number, since it is smaller than the sum of its proper divisors (164459940).

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

79361820 is a wasteful number, since it uses less digits than its factorization.

79361820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5675 (or 5670 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 79361820 is about 8908.5251304579. The cubic root of 79361820 is about 429.7381134737.

The spelling of 79361820 in words is "seventy-nine million, three hundred sixty-one thousand, eight hundred twenty".