90109560 has 64 divisors (see below), whose sum is σ = 279060480. Its totient is φ = 23253120.

The previous prime is 90109519. The next prime is 90109619. The reversal of 90109560 is 6590109.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8392 + ... + 15831.

It is an arithmetic number, because the mean of its divisors is an integer number (4360320).

Almost surely, 2^90109560 is an apocalyptic number.

It is an amenable number.

90109560 is an abundant number, since it is smaller than the sum of its proper divisors (188950920).

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

90109560 is a wasteful number, since it uses less digits than its factorization.

90109560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24268 (or 24264 counting only the distinct ones).

The product of its (nonzero) digits is 2430, while the sum is 30.

The square root of 90109560 is about 9492.6055432637. The cubic root of 90109560 is about 448.3222463627.

Adding to 90109560 its reverse (6590109), we get a palindrome (96699669).

The spelling of 90109560 in words is "ninety million, one hundred nine thousand, five hundred sixty".