99570 has 16 divisors (see below), whose sum is σ = 239040. Its totient is φ = 26544.

The previous prime is 99563. The next prime is 99571. The reversal of 99570 is 7599.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 3319 = 99570 / (9 + 9 + 5 + 7 + 0).

It is a plaindrome in base 11.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 99570.

It is not an unprimeable number, because it can be changed into a prime (99571) by changing a digit.

99570 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1630 + ... + 1689.

It is an arithmetic number, because the mean of its divisors is an integer number (14940).

2⁹⁹⁵⁷⁰ is an apocalyptic number.

99570 is an abundant number, since it is smaller than the sum of its proper divisors (139470).

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

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (119520).

99570 is a wasteful number, since it uses less digits than its factorization.

99570 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3329.

The product of its (nonzero) digits is 2835, while the sum is 30.

The square root of 99570 is about 315.5471438628. The cubic root of 99570 is about 46.3492633089.

The spelling of 99570 in words is "ninety-nine thousand, five hundred seventy".