79822540 has 24 divisors (see below), whose sum is σ = 191574432. Its totient is φ = 27367680.

The previous prime is 79822537. The next prime is 79822541. The reversal of 79822540 is 4522897.

It is a self number, because there is not a number n which added to its sum of digits gives 79822540.

It is not an unprimeable number, because it can be changed into a prime (79822541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 284941 + ... + 285220.

It is an arithmetic number, because the mean of its divisors is an integer number (7982268).

Almost surely, 2^79822540 is an apocalyptic number.

79822540 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

79822540 is an abundant number, since it is smaller than the sum of its proper divisors (111751892).

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

79822540 is a wasteful number, since it uses less digits than its factorization.

79822540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 570177 (or 570175 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 79822540 is about 8934.3460868717. The cubic root of 79822540 is about 430.5680971504.

The spelling of 79822540 in words is "seventy-nine million, eight hundred twenty-two thousand, five hundred forty".