90885825 has 36 divisors (see below), whose sum is σ = 172369548. Its totient is φ = 45619200.

The previous prime is 90885763. The next prime is 90885833. The reversal of 90885825 is 52858809.

It can be written as a sum of positive squares in 6 ways, for example, as 103041 + 90782784 = 321^2 + 9528^2 .

It is not a de Polignac number, because 90885825 - 2²¹ = 88788673 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 8056 + ... + 15705.

It is an arithmetic number, because the mean of its divisors is an integer number (4788043).

Almost surely, 2^90885825 is an apocalyptic number.

It is an amenable number.

90885825 is a deficient number, since it is larger than the sum of its proper divisors (81483723).

90885825 is a wasteful number, since it uses less digits than its factorization.

90885825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23794 (or 23786 counting only the distinct ones).

The product of its (nonzero) digits is 230400, while the sum is 45.

The square root of 90885825 is about 9533.4057398183. The cubic root of 90885825 is about 449.6059513429.

The spelling of 90885825 in words is "ninety million, eight hundred eighty-five thousand, eight hundred twenty-five".