90454218 has 16 divisors (see below), whose sum is σ = 186744576. Its totient is φ = 29178720.

The previous prime is 90454211. The next prime is 90454237. The reversal of 90454218 is 81245409.

It is not an unprimeable number, because it can be changed into a prime (90454211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 242971 + ... + 243342.

It is an arithmetic number, because the mean of its divisors is an integer number (11671536).

Almost surely, 2^90454218 is an apocalyptic number.

90454218 is an abundant number, since it is smaller than the sum of its proper divisors (96290358).

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

90454218 is a wasteful number, since it uses less digits than its factorization.

90454218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 486349.

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 90454218 is about 9510.7422423279. The cubic root of 90454218 is about 448.8931116605.

The spelling of 90454218 in words is "ninety million, four hundred fifty-four thousand, two hundred eighteen".