99180816 has 80 divisors (see below), whose sum is σ = 294326400. Its totient is φ = 28191744.

The previous prime is 99180803. The next prime is 99180827. The reversal of 99180816 is 61808199.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76300 + ... + 77588.

It is an arithmetic number, because the mean of its divisors is an integer number (3679080).

Almost surely, 2^99180816 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 99180816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (147163200).

99180816 is an abundant number, since it is smaller than the sum of its proper divisors (195145584).

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

99180816 is a wasteful number, since it uses less digits than its factorization.

99180816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1536 (or 1530 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 42.

The square root of 99180816 is about 9958.9565718503. The cubic root of 99180816 is about 462.8879682042.

The spelling of 99180816 in words is "ninety-nine million, one hundred eighty thousand, eight hundred sixteen".