90505180 has 12 divisors (see below), whose sum is σ = 190060920. Its totient is φ = 36202064.

The previous prime is 90505169. The next prime is 90505183. The reversal of 90505180 is 8150509.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90505183) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2262610 + ... + 2262649.

It is an arithmetic number, because the mean of its divisors is an integer number (15838410).

Almost surely, 2^90505180 is an apocalyptic number.

It is an amenable number.

90505180 is an abundant number, since it is smaller than the sum of its proper divisors (99555740).

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

90505180 is a wasteful number, since it uses less digits than its factorization.

90505180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4525268 (or 4525266 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 28.

The square root of 90505180 is about 9513.4210460801. The cubic root of 90505180 is about 448.9773981146.

Adding to 90505180 its reverse (8150509), we get a palindrome (98655689).

The spelling of 90505180 in words is "ninety million, five hundred five thousand, one hundred eighty".