99580 has 24 divisors (see below), whose sum is σ = 225792. Its totient is φ = 36672.

The previous prime is 99577. The next prime is 99581. The reversal of 99580 is 8599.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99581) 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, 69 + ... + 451.

It is an arithmetic number, because the mean of its divisors is an integer number (9408).

2⁹⁹⁵⁸⁰ 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 99580, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (112896).

99580 is an abundant number, since it is smaller than the sum of its proper divisors (126212).

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

99580 is a wasteful number, since it uses less digits than its factorization.

99580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 405 (or 403 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 31.

The square root of 99580 is about 315.5629889578. The cubic root of 99580 is about 46.3508149044.

The spelling of 99580 in words is "ninety-nine thousand, five hundred eighty".