90005618 has 16 divisors (see below), whose sum is σ = 140978880. Its totient is φ = 43041936.

The previous prime is 90005609. The next prime is 90005627. The reversal of 90005618 is 81650009.

It is an interprime number because it is at equal distance from previous prime (90005609) and next prime (90005627).

It is a super-2 number, since 2×90005618² = 16202022543123848, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1046 + ... + 13457.

It is an arithmetic number, because the mean of its divisors is an integer number (8811180).

Almost surely, 2^90005618 is an apocalyptic number.

90005618 is a deficient number, since it is larger than the sum of its proper divisors (50973262).

90005618 is a wasteful number, since it uses less digits than its factorization.

90005618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14641.

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 90005618 is about 9487.1290704828. The cubic root of 90005618 is about 448.1497991031.

The spelling of 90005618 in words is "ninety million, five thousand, six hundred eighteen".