99555988 has 12 divisors (see below), whose sum is σ = 199112032. Its totient is φ = 42666840.

The previous prime is 99555977. The next prime is 99555997. The reversal of 99555988 is 88955599.

It is a happy number.

99555988 is an admirable number.

It is a super-2 number, since 2×99555988² = 19822789493312288, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1777758 + ... + 1777813.

Almost surely, 2^99555988 is an apocalyptic number.

It is an amenable number.

99555988 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

99555988 is a wasteful number, since it uses less digits than its factorization.

99555988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3555582 (or 3555580 counting only the distinct ones).

The product of its digits is 5832000, while the sum is 58.

The square root of 99555988 is about 9977.7747018060. The cubic root of 99555988 is about 463.4708903835.

The spelling of 99555988 in words is "ninety-nine million, five hundred fifty-five thousand, nine hundred eighty-eight".