90269618 has 24 divisors (see below), whose sum is σ = 145069596. Its totient is φ = 42099200.

The previous prime is 90269617. The next prime is 90269629. The reversal of 90269618 is 81696209.

It can be written as a sum of positive squares in 2 ways, for example, as 80048809 + 10220809 = 8947^2 + 3197^2 .

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (90269617) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 42338 + ... + 44418.

Almost surely, 2^90269618 is an apocalyptic number.

90269618 is a deficient number, since it is larger than the sum of its proper divisors (54799978).

90269618 is a wasteful number, since it uses less digits than its factorization.

90269618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2170 (or 2147 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 41.

The square root of 90269618 is about 9501.0324702108. The cubic root of 90269618 is about 448.5875349635.

The spelling of 90269618 in words is "ninety million, two hundred sixty-nine thousand, six hundred eighteen".