90189056 has 18 divisors (see below), whose sum is σ = 180026322. Its totient is φ = 45094400.

The previous prime is 90189037. The next prime is 90189059. The reversal of 90189056 is 65098109.

It can be written as a sum of positive squares in only one way, i.e., 70829056 + 19360000 = 8416^2 + 4400^2 .

It is a super-2 number, since 2×90189056² = 16268131644342272, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90189059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 175895 + ... + 176406.

Almost surely, 2^90189056 is an apocalyptic number.

It is an amenable number.

90189056 is a deficient number, since it is larger than the sum of its proper divisors (89837266).

90189056 is an equidigital number, since it uses as much as digits as its factorization.

90189056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 352317 (or 352303 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 38.

The square root of 90189056 is about 9496.7918793664. The cubic root of 90189056 is about 448.4540464727.

The spelling of 90189056 in words is "ninety million, one hundred eighty-nine thousand, fifty-six".