79805580 has 24 divisors (see below), whose sum is σ = 223455792. Its totient is φ = 21281472.

The previous prime is 79805527. The next prime is 79805581. The reversal of 79805580 is 8550897.

It is a super-3 number, since 3×79805580³ (a number of 25 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (79805581) 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, 664987 + ... + 665106.

It is an arithmetic number, because the mean of its divisors is an integer number (9310658).

Almost surely, 2^79805580 is an apocalyptic number.

It is an amenable number.

79805580 is an abundant number, since it is smaller than the sum of its proper divisors (143650212).

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

79805580 is a wasteful number, since it uses less digits than its factorization.

79805580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1330105 (or 1330103 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 42.

The square root of 79805580 is about 8933.3968903212. The cubic root of 79805580 is about 430.5376005339.

The spelling of 79805580 in words is "seventy-nine million, eight hundred five thousand, five hundred eighty".