79920000 has 320 divisors, whose sum is σ = 302715600. Its totient is φ = 20736000.

The previous prime is 79919989. The next prime is 79920019. The reversal of 79920000 is 2997.

It is a tau number, because it is divible by the number of its divisors (320).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 2159982 + ... + 2160018.

Almost surely, 2^79920000 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 79920000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (151357800).

79920000 is an abundant number, since it is smaller than the sum of its proper divisors (222795600).

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

79920000 is an equidigital number, since it uses as much as digits as its factorization.

79920000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80 (or 47 counting only the distinct ones).

The product of its (nonzero) digits is 1134, while the sum is 27.

The square root of 79920000 is about 8939.7986554508. The cubic root of 79920000 is about 430.7432611241.

Adding to 79920000 its reverse (2997), we get a palindrome (79922997).

The spelling of 79920000 in words is "seventy-nine million, nine hundred twenty thousand".