99180144 has 120 divisors (see below), whose sum is σ = 322619232. Its totient is φ = 27855360.

The previous prime is 99180143. The next prime is 99180149. The reversal of 99180144 is 44108199.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 99180099 and 99180108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99180143) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 60682 + ... + 62294.

Almost surely, 2^99180144 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 99180144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (161309616).

99180144 is an abundant number, since it is smaller than the sum of its proper divisors (223439088).

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

99180144 is a wasteful number, since it uses less digits than its factorization.

99180144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1695 (or 1686 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 99180144 is about 9958.9228333189. The cubic root of 99180144 is about 462.8869227688.

The spelling of 99180144 in words is "ninety-nine million, one hundred eighty thousand, one hundred forty-four".