99889090 has 16 divisors (see below), whose sum is σ = 205486272. Its totient is φ = 34247664.

The previous prime is 99889087. The next prime is 99889103. The reversal of 99889090 is 9098899.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 713424 + ... + 713563.

It is an arithmetic number, because the mean of its divisors is an integer number (12842892).

Almost surely, 2^99889090 is an apocalyptic number.

99889090 is an abundant number, since it is smaller than the sum of its proper divisors (105597182).

99889090 is a wasteful number, since it uses less digits than its factorization.

99889090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1427001.

The product of its (nonzero) digits is 419904, while the sum is 52.

The square root of 99889090 is about 9994.4529615182. The cubic root of 99889090 is about 463.9872203426.

The spelling of 99889090 in words is "ninety-nine million, eight hundred eighty-nine thousand, ninety".