99155880 has 64 divisors (see below), whose sum is σ = 330523200. Its totient is φ = 26441280.

The previous prime is 99155869. The next prime is 99155897. The reversal of 99155880 is 8855199.

99155880 is a `hidden beast` number, since 9 + 91 + 558 + 8 + 0 = 666.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44826 + ... + 46985.

It is an arithmetic number, because the mean of its divisors is an integer number (5164425).

Almost surely, 2^99155880 is an apocalyptic number.

99155880 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

99155880 is an abundant number, since it is smaller than the sum of its proper divisors (231367320).

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

99155880 is a wasteful number, since it uses less digits than its factorization.

99155880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91831 (or 91821 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 45.

The square root of 99155880 is about 9957.7045547656. The cubic root of 99155880 is about 462.8491719184.

The spelling of 99155880 in words is "ninety-nine million, one hundred fifty-five thousand, eight hundred eighty".