90418580 has 48 divisors (see below), whose sum is σ = 229775616. Its totient is φ = 29176320.

The previous prime is 90418567. The next prime is 90418633. The reversal of 90418580 is 8581409.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 90418580.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16616 + ... + 21375.

It is an arithmetic number, because the mean of its divisors is an integer number (4786992).

Almost surely, 2^90418580 is an apocalyptic number.

It is an amenable number.

90418580 is an abundant number, since it is smaller than the sum of its proper divisors (139357036).

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

90418580 is a wasteful number, since it uses less digits than its factorization.

90418580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38024 (or 38022 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 35.

The square root of 90418580 is about 9508.8684920973. The cubic root of 90418580 is about 448.8341508790.

Adding to 90418580 its reverse (8581409), we get a palindrome (98999989).

The spelling of 90418580 in words is "ninety million, four hundred eighteen thousand, five hundred eighty".