99198180 has 72 divisors (see below), whose sum is σ = 303626232. Its totient is φ = 26213376.

The previous prime is 99198173. The next prime is 99198193. The reversal of 99198180 is 8189199.

It can be written as a sum of positive squares in 4 ways, for example, as 1425636 + 97772544 = 1194^2 + 9888^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17902 + ... + 22778.

It is an arithmetic number, because the mean of its divisors is an integer number (4217031).

Almost surely, 2^99198180 is an apocalyptic number.

99198180 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 99198180, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (151813116).

99198180 is an abundant number, since it is smaller than the sum of its proper divisors (204428052).

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

99198180 is a wasteful number, since it uses less digits than its factorization.

99198180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5005 (or 5000 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 45.

The square root of 99198180 is about 9959.8283117733. The cubic root of 99198180 is about 462.9149798717.

The spelling of 99198180 in words is "ninety-nine million, one hundred ninety-eight thousand, one hundred eighty".