79923240 has 128 divisors (see below), whose sum is σ = 272764800. Its totient is φ = 20805120.

The previous prime is 79923203. The next prime is 79923241. The reversal of 79923240 is 4232997.

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

It is a junction number, because it is equal to n+sod(n) for n = 79923195 and 79923204.

It is not an unprimeable number, because it can be changed into a prime (79923241) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 45580 + ... + 47300.

It is an arithmetic number, because the mean of its divisors is an integer number (2130975).

Almost surely, 2^79923240 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 79923240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (136382400).

79923240 is an abundant number, since it is smaller than the sum of its proper divisors (192841560).

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

79923240 is a wasteful number, since it uses less digits than its factorization.

79923240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1784 (or 1774 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The square root of 79923240 is about 8939.9798657491. The cubic root of 79923240 is about 430.7490819003.

The spelling of 79923240 in words is "seventy-nine million, nine hundred twenty-three thousand, two hundred forty".