90800055 has 16 divisors (see below), whose sum is σ = 161422560. Its totient is φ = 48426624.

The previous prime is 90800027. The next prime is 90800081. The reversal of 90800055 is 55000809.

It is not a de Polignac number, because 90800055 - 2⁷ = 90799927 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 336162 + ... + 336431.

It is an arithmetic number, because the mean of its divisors is an integer number (10088910).

Almost surely, 2^90800055 is an apocalyptic number.

90800055 is a deficient number, since it is larger than the sum of its proper divisors (70622505).

90800055 is a wasteful number, since it uses less digits than its factorization.

90800055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 672607 (or 672601 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 27.

The square root of 90800055 is about 9528.9062856133. The cubic root of 90800055 is about 449.4644740572.

The spelling of 90800055 in words is "ninety million, eight hundred thousand, fifty-five".