79022640 has 80 divisors (see below), whose sum is σ = 247984128. Its totient is φ = 20813568.

The previous prime is 79022599. The next prime is 79022677. The reversal of 79022640 is 4622097.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

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 = 79022598 and 79022607.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17937 + ... + 21903.

Almost surely, 2^79022640 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 79022640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (123992064).

79022640 is an abundant number, since it is smaller than the sum of its proper divisors (168961488).

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

79022640 is a wasteful number, since it uses less digits than its factorization.

79022640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4066 (or 4060 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 79022640 is about 8889.4679255847. The cubic root of 79022640 is about 429.1250280818.

The spelling of 79022640 in words is "seventy-nine million, twenty-two thousand, six hundred forty".