90506180 has 12 divisors (see below), whose sum is σ = 190063020. Its totient is φ = 36202464.

The previous prime is 90506167. The next prime is 90506183. The reversal of 90506180 is 8160509.

It can be written as a sum of positive squares in 2 ways, for example, as 56190016 + 34316164 = 7496^2 + 5858^2 .

It is not an unprimeable number, because it can be changed into a prime (90506183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2262635 + ... + 2262674.

It is an arithmetic number, because the mean of its divisors is an integer number (15838585).

Almost surely, 2^90506180 is an apocalyptic number.

It is an amenable number.

90506180 is an abundant number, since it is smaller than the sum of its proper divisors (99556840).

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

90506180 is a wasteful number, since it uses less digits than its factorization.

90506180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4525318 (or 4525316 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 90506180 is about 9513.4736032640. The cubic root of 90506180 is about 448.9790517059.

Adding to 90506180 its reverse (8160509), we get a palindrome (98666689).

The spelling of 90506180 in words is "ninety million, five hundred six thousand, one hundred eighty".