99568890 has 48 divisors (see below), whose sum is σ = 267813000. Its totient is φ = 25635456.

The previous prime is 99568883. The next prime is 99568921. The reversal of 99568890 is 9886599.

It can be written as a sum of positive squares in 4 ways, for example, as 95121009 + 4447881 = 9753^2 + 2109^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16465 + ... + 21684.

Almost surely, 2^99568890 is an apocalyptic number.

99568890 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

99568890 is an abundant number, since it is smaller than the sum of its proper divisors (168244110).

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

99568890 is a wasteful number, since it uses less digits than its factorization.

99568890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38191 (or 38188 counting only the distinct ones).

The product of its (nonzero) digits is 1399680, while the sum is 54.

The square root of 99568890 is about 9978.4212178080. The cubic root of 99568890 is about 463.4909107534.

The spelling of 99568890 in words is "ninety-nine million, five hundred sixty-eight thousand, eight hundred ninety".