90090618 has 8 divisors (see below), whose sum is σ = 180181248. Its totient is φ = 30030204.

The previous prime is 90090577. The next prime is 90090629. The reversal of 90090618 is 81609009.

It is a happy number.

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

90090618 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, 7507546 + ... + 7507557.

It is an arithmetic number, because the mean of its divisors is an integer number (22522656).

Almost surely, 2^90090618 is an apocalyptic number.

90090618 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.

90090618 is a wasteful number, since it uses less digits than its factorization.

90090618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15015108.

The product of its (nonzero) digits is 3888, while the sum is 33.

The square root of 90090618 is about 9491.6077668644. The cubic root of 90090618 is about 448.2908301063.

The spelling of 90090618 in words is "ninety million, ninety thousand, six hundred eighteen".