90325440 has 168 divisors, whose sum is σ = 315407040. Its totient is φ = 23721984.

The previous prime is 90325423. The next prime is 90325453. The reversal of 90325440 is 4452309.

90325440 is a `hidden beast` number, since 90 + 32 + 544 + 0 = 666.

It is a super-2 number, since 2×90325440² = 16317370222387200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 227322 + ... + 227718.

Almost surely, 2^90325440 is an apocalyptic number.

90325440 is a gapful number since it is divisible by the number (90) 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 90325440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (157703520).

90325440 is an abundant number, since it is smaller than the sum of its proper divisors (225081600).

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

90325440 is a wasteful number, since it uses less digits than its factorization.

90325440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 499 (or 486 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 90325440 is about 9503.9696969214. The cubic root of 90325440 is about 448.6799835414.

Adding to 90325440 its reverse (4452309), we get a palindrome (94777749).

The spelling of 90325440 in words is "ninety million, three hundred twenty-five thousand, four hundred forty".