90055885 has 16 divisors (see below), whose sum is σ = 117219312. Its totient is φ = 66150400.

The previous prime is 90055871. The next prime is 90055921. The reversal of 90055885 is 58855009.

It can be written as a sum of positive squares in 8 ways, for example, as 9253764 + 80802121 = 3042^2 + 8989^2 .

It is not a de Polignac number, because 90055885 - 2¹³ = 90047693 is a prime.

It is a super-2 number, since 2×90055885² = 16220124846266450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9436 + ... + 16405.

It is an arithmetic number, because the mean of its divisors is an integer number (7326207).

Almost surely, 2^90055885 is an apocalyptic number.

It is an amenable number.

90055885 is a deficient number, since it is larger than the sum of its proper divisors (27163427).

90055885 is a wasteful number, since it uses less digits than its factorization.

90055885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25904.

The product of its (nonzero) digits is 72000, while the sum is 40.

The square root of 90055885 is about 9489.7779215322. Note that the first 3 decimals coincide. The cubic root of 90055885 is about 448.2332122428.

The spelling of 90055885 in words is "ninety million, fifty-five thousand, eight hundred eighty-five".