90444525 has 24 divisors (see below), whose sum is σ = 150124320. Its totient is φ = 48047040.

The previous prime is 90444521. The next prime is 90444547. The reversal of 90444525 is 52544409.

90444525 is a nontrivial binomial coefficient, being equal to C(13450, 2).

It is not a de Polignac number, because 90444525 - 2² = 90444521 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90444521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17934 + ... + 22416.

It is an arithmetic number, because the mean of its divisors is an integer number (6255180).

Almost surely, 2^90444525 is an apocalyptic number.

90444525 is the 13449-th triangular number and also the 6725-th hexagonal number.

It is an amenable number.

90444525 is a deficient number, since it is larger than the sum of its proper divisors (59679795).

90444525 is a wasteful number, since it uses less digits than its factorization.

90444525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4765 (or 4760 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 33.

The square root of 90444525 is about 9510.2326469966. The cubic root of 90444525 is about 448.8770767482.

The spelling of 90444525 in words is "ninety million, four hundred forty-four thousand, five hundred twenty-five".