90606220 has 24 divisors (see below), whose sum is σ = 191343600. Its totient is φ = 36038592.

The previous prime is 90606181. The next prime is 90606221. The reversal of 90606220 is 2260609.

It is not an unprimeable number, because it can be changed into a prime (90606221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9075 + ... + 16234.

It is an arithmetic number, because the mean of its divisors is an integer number (7972650).

Almost surely, 2^90606220 is an apocalyptic number.

It is an amenable number.

90606220 is an abundant number, since it is smaller than the sum of its proper divisors (100737380).

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

90606220 is a wasteful number, since it uses less digits than its factorization.

90606220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25497 (or 25495 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 90606220 is about 9518.7299573000. The cubic root of 90606220 is about 449.1444154612.

Adding to 90606220 its reverse (2260609), we get a palindrome (92866829).

The spelling of 90606220 in words is "ninety million, six hundred six thousand, two hundred twenty".