90638055 has 32 divisors (see below), whose sum is σ = 168145920. Its totient is φ = 46236960.

The previous prime is 90638027. The next prime is 90638059. The reversal of 90638055 is 55083609.

It is not a de Polignac number, because 90638055 - 2¹⁵ = 90605287 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90638059) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11491 + ... + 17700.

It is an arithmetic number, because the mean of its divisors is an integer number (5254560).

Almost surely, 2^90638055 is an apocalyptic number.

90638055 is a deficient number, since it is larger than the sum of its proper divisors (77507865).

90638055 is a wasteful number, since it uses less digits than its factorization.

90638055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29228 (or 29222 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The square root of 90638055 is about 9520.4020398300. The cubic root of 90638055 is about 449.1970124322.

The spelling of 90638055 in words is "ninety million, six hundred thirty-eight thousand, fifty-five".