79222440 has 64 divisors (see below), whose sum is σ = 259277760. Its totient is φ = 19205120.

The previous prime is 79222393. The next prime is 79222441. The reversal of 79222440 is 4422297.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 79222398 and 79222407.

It is not an unprimeable number, because it can be changed into a prime (79222441) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 28689 + ... + 31328.

It is an arithmetic number, because the mean of its divisors is an integer number (4051215).

Almost surely, 2^79222440 is an apocalyptic number.

It is an amenable number.

79222440 is an abundant number, since it is smaller than the sum of its proper divisors (180055320).

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

79222440 is a wasteful number, since it uses less digits than its factorization.

79222440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60042 (or 60038 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 30.

The square root of 79222440 is about 8900.6988489669. The cubic root of 79222440 is about 429.4863887470.

It can be divided in two parts, 792 and 22440, that added together give a palindrome (23232).

The spelling of 79222440 in words is "seventy-nine million, two hundred twenty-two thousand, four hundred forty".