90550218 has 32 divisors (see below), whose sum is σ = 206157312. Its totient is φ = 26246000.

The previous prime is 90550199. The next prime is 90550297. The reversal of 90550218 is 81205509.

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, 28308 + ... + 31343.

It is an arithmetic number, because the mean of its divisors is an integer number (6442416).

Almost surely, 2^90550218 is an apocalyptic number.

90550218 is an abundant number, since it is smaller than the sum of its proper divisors (115607094).

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

90550218 is a wasteful number, since it uses less digits than its factorization.

90550218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59690.

The product of its (nonzero) digits is 3600, while the sum is 30.

The square root of 90550218 is about 9515.7878286561. The cubic root of 90550218 is about 449.0518604853.

The spelling of 90550218 in words is "ninety million, five hundred fifty thousand, two hundred eighteen".