79963920 has 240 divisors, whose sum is σ = 292481280. Its totient is φ = 19501056.

The previous prime is 79963907. The next prime is 79963931. The reversal of 79963920 is 2936997.

79963920 is a `hidden beast` number, since 7 + 9 + 9 + 639 + 2 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (240).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 575211 + ... + 575349.

It is an arithmetic number, because the mean of its divisors is an integer number (1218672).

Almost surely, 2^79963920 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 79963920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (146240640).

79963920 is an abundant number, since it is smaller than the sum of its proper divisors (212517360).

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

79963920 is a wasteful number, since it uses less digits than its factorization.

79963920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222 (or 213 counting only the distinct ones).

The product of its (nonzero) digits is 183708, while the sum is 45.

The square root of 79963920 is about 8942.2547492229. The cubic root of 79963920 is about 430.8221515962.

The spelling of 79963920 in words is "seventy-nine million, nine hundred sixty-three thousand, nine hundred twenty".