99890590 has 8 divisors (see below), whose sum is σ = 179803080. Its totient is φ = 39956232.

The previous prime is 99890579. The next prime is 99890627. The reversal of 99890590 is 9509899.

It is a sphenic number, since it is the product of 3 distinct primes.

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, 4994520 + ... + 4994539.

It is an arithmetic number, because the mean of its divisors is an integer number (22475385).

Almost surely, 2^99890590 is an apocalyptic number.

99890590 is a deficient number, since it is larger than the sum of its proper divisors (79912490).

99890590 is a wasteful number, since it uses less digits than its factorization.

99890590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9989066.

The product of its (nonzero) digits is 262440, while the sum is 49.

The square root of 99890590 is about 9994.5280028624. The cubic root of 99890590 is about 463.9895428430.

The spelling of 99890590 in words is "ninety-nine million, eight hundred ninety thousand, five hundred ninety".