79819620 has 96 divisors (see below), whose sum is σ = 232678656. Its totient is φ = 20428800.

The previous prime is 79819613. The next prime is 79819631. The reversal of 79819620 is 2691897.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 174432 + ... + 174888.

It is an arithmetic number, because the mean of its divisors is an integer number (2423736).

Almost surely, 2^79819620 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 79819620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (116339328).

79819620 is an abundant number, since it is smaller than the sum of its proper divisors (152859036).

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

79819620 is a wasteful number, since it uses less digits than its factorization.

79819620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 581 (or 579 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 42.

The square root of 79819620 is about 8934.1826710673. The cubic root of 79819620 is about 430.5628468615.

It can be divided in two parts, 798196 and 20, that added together give a triangular number (798216 = T₁₂₆₃).

The spelling of 79819620 in words is "seventy-nine million, eight hundred nineteen thousand, six hundred twenty".