89958990 has 32 divisors (see below), whose sum is σ = 235529856. Its totient is φ = 21808160.

The previous prime is 89958989. The next prime is 89958997. The reversal of 89958990 is 9985998.

It is a self number, because there is not a number n which added to its sum of digits gives 89958990.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89958997) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 135972 + ... + 136631.

It is an arithmetic number, because the mean of its divisors is an integer number (7360308).

Almost surely, 2^89958990 is an apocalyptic number.

89958990 is an abundant number, since it is smaller than the sum of its proper divisors (145570866).

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

89958990 is a wasteful number, since it uses less digits than its factorization.

89958990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272624.

The product of its (nonzero) digits is 2099520, while the sum is 57.

The square root of 89958990 is about 9484.6713174469. The cubic root of 89958990 is about 448.0723967556.

The spelling of 89958990 in words is "eighty-nine million, nine hundred fifty-eight thousand, nine hundred ninety".