89990555 has 32 divisors (see below), whose sum is σ = 118117440. Its totient is φ = 65594880.

The previous prime is 89990543. The next prime is 89990561. The reversal of 89990555 is 55509998.

It is not a de Polignac number, because 89990555 - 2⁶ = 89990491 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 306989 + ... + 307281.

It is an arithmetic number, because the mean of its divisors is an integer number (3691170).

Almost surely, 2^89990555 is an apocalyptic number.

89990555 is a deficient number, since it is larger than the sum of its proper divisors (28126885).

89990555 is a wasteful number, since it uses less digits than its factorization.

89990555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 431.

The product of its (nonzero) digits is 729000, while the sum is 50.

The square root of 89990555 is about 9486.3351722359. The cubic root of 89990555 is about 448.1247974896.

The spelling of 89990555 in words is "eighty-nine million, nine hundred ninety thousand, five hundred fifty-five".