90318280 has 96 divisors (see below), whose sum is σ = 232865640. Its totient is φ = 31334400.

The previous prime is 90318271. The next prime is 90318313. The reversal of 90318280 is 8281309.

It can be written as a sum of positive squares in 12 ways, for example, as 29571844 + 60746436 = 5438^2 + 7794^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 149980 + ... + 150580.

Almost surely, 2^90318280 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 90318280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (116432820).

90318280 is an abundant number, since it is smaller than the sum of its proper divisors (142547360).

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

90318280 is a wasteful number, since it uses less digits than its factorization.

90318280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 659 (or 638 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 90318280 is about 9503.5930047535. The cubic root of 90318280 is about 448.6681277690.

Adding to 90318280 its reverse (8281309), we get a palindrome (98599589).

The spelling of 90318280 in words is "ninety million, three hundred eighteen thousand, two hundred eighty".