90440575 has 6 divisors (see below), whose sum is σ = 112146344. Its totient is φ = 72352440.

The previous prime is 90440563. The next prime is 90440579. The reversal of 90440575 is 57504409.

It is not a de Polignac number, because 90440575 - 2¹³ = 90432383 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 90440575.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90440579) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1808787 + ... + 1808836.

Almost surely, 2^90440575 is an apocalyptic number.

90440575 is a deficient number, since it is larger than the sum of its proper divisors (21705769).

90440575 is a wasteful number, since it uses less digits than its factorization.

90440575 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3617633 (or 3617628 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 34.

The square root of 90440575 is about 9510.0249736791. The cubic root of 90440575 is about 448.8705420233.

The spelling of 90440575 in words is "ninety million, four hundred forty thousand, five hundred seventy-five".