79679820 has 192 divisors, whose sum is σ = 264176640. Its totient is φ = 17740800.

The previous prime is 79679807. The next prime is 79679837. The reversal of 79679820 is 2897697.

It is a self number, because there is not a number n which added to its sum of digits gives 79679820.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 440130 + ... + 440310.

It is an arithmetic number, because the mean of its divisors is an integer number (1375920).

Almost surely, 2^79679820 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 79679820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (132088320).

79679820 is an abundant number, since it is smaller than the sum of its proper divisors (184496820).

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

79679820 is a wasteful number, since it uses less digits than its factorization.

79679820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256 (or 254 counting only the distinct ones).

The product of its (nonzero) digits is 381024, while the sum is 48.

The square root of 79679820 is about 8926.3553592718. The cubic root of 79679820 is about 430.3113303309.

The spelling of 79679820 in words is "seventy-nine million, six hundred seventy-nine thousand, eight hundred twenty".