99859992 has 32 divisors (see below), whose sum is σ = 258260400. Its totient is φ = 32138624.

The previous prime is 99859979. The next prime is 99859999. The reversal of 99859992 is 29995899.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99859999) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71043 + ... + 72434.

Almost surely, 2^99859992 is an apocalyptic number.

It is an amenable number.

99859992 is an abundant number, since it is smaller than the sum of its proper divisors (158400408).

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

99859992 is a wasteful number, since it uses less digits than its factorization.

99859992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143515 (or 143511 counting only the distinct ones).

The product of its digits is 4723920, while the sum is 60.

The square root of 99859992 is about 9992.9971480032. The cubic root of 99859992 is about 463.9421623311.

The spelling of 99859992 in words is "ninety-nine million, eight hundred fifty-nine thousand, nine hundred ninety-two".