99405988 has 24 divisors (see below), whose sum is σ = 191739744. Its totient is φ = 44716800.

The previous prime is 99405947. The next prime is 99406009. The reversal of 99405988 is 88950499.

It is a super-2 number, since 2×99405988² = 19763100900512288, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7378 + ... + 15913.

It is an arithmetic number, because the mean of its divisors is an integer number (7989156).

Almost surely, 2^99405988 is an apocalyptic number.

It is an amenable number.

99405988 is a deficient number, since it is larger than the sum of its proper divisors (92333756).

99405988 is a wasteful number, since it uses less digits than its factorization.

99405988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23403 (or 23401 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 52.

The square root of 99405988 is about 9970.2551622313. The cubic root of 99405988 is about 463.2380044146.

The spelling of 99405988 in words is "ninety-nine million, four hundred five thousand, nine hundred eighty-eight".