90222618 has 8 divisors (see below), whose sum is σ = 180445248. Its totient is φ = 30074204.

The previous prime is 90222581. The next prime is 90222631. The reversal of 90222618 is 81622209.

It is a sphenic number, since it is the product of 3 distinct primes.

90222618 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7518546 + ... + 7518557.

It is an arithmetic number, because the mean of its divisors is an integer number (22555656).

Almost surely, 2^90222618 is an apocalyptic number.

90222618 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

90222618 is a wasteful number, since it uses less digits than its factorization.

90222618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15037108.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 90222618 is about 9498.5587327763. The cubic root of 90222618 is about 448.5096672202.

The spelling of 90222618 in words is "ninety million, two hundred twenty-two thousand, six hundred eighteen".