79549440 has 88 divisors (see below), whose sum is σ = 254483040. Its totient is φ = 21209088.

The previous prime is 79549423. The next prime is 79549451. The reversal of 79549440 is 4494597.

It is a super-2 number, since 2×79549440² = 12656226808627200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 79549392 and 79549401.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12771 + ... + 17949.

Almost surely, 2^79549440 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 79549440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (127241520).

79549440 is an abundant number, since it is smaller than the sum of its proper divisors (174933600).

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

79549440 is a wasteful number, since it uses less digits than its factorization.

79549440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5207 (or 5189 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 42.

The square root of 79549440 is about 8919.0492766886. The cubic root of 79549440 is about 430.0764962158.

The spelling of 79549440 in words is "seventy-nine million, five hundred forty-nine thousand, four hundred forty".