90218944 has 56 divisors (see below), whose sum is σ = 185440320. Its totient is φ = 43524096.

The previous prime is 90218941. The next prime is 90218963. The reversal of 90218944 is 44981209.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90218941) 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, 267544 + ... + 267880.

Almost surely, 2^90218944 is an apocalyptic number.

90218944 is a gapful number since it is divisible by the number (94) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 90218944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92720160).

90218944 is an abundant number, since it is smaller than the sum of its proper divisors (95221376).

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

90218944 is a wasteful number, since it uses less digits than its factorization.

90218944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 485 (or 475 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 90218944 is about 9498.3653330455. The cubic root of 90218944 is about 448.5035791426.

The spelling of 90218944 in words is "ninety million, two hundred eighteen thousand, nine hundred forty-four".