90253218 has 32 divisors (see below), whose sum is σ = 201724992. Its totient is φ = 26681600.

The previous prime is 90253193. The next prime is 90253243. The reversal of 90253218 is 81235209.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (90253193) and next prime (90253243).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13971 + ... + 19382.

It is an arithmetic number, because the mean of its divisors is an integer number (6303906).

Almost surely, 2^90253218 is an apocalyptic number.

90253218 is an abundant number, since it is smaller than the sum of its proper divisors (111471774).

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

90253218 is a wasteful number, since it uses less digits than its factorization.

90253218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33410.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 90253218 is about 9500.1693669113. The cubic root of 90253218 is about 448.5603671622.

Subtracting from 90253218 its reverse (81235209), we obtain a square (9018009 = 3003²).

The spelling of 90253218 in words is "ninety million, two hundred fifty-three thousand, two hundred eighteen".