90558220 has 12 divisors (see below), whose sum is σ = 190172304. Its totient is φ = 36223280.

The previous prime is 90558211. The next prime is 90558241. The reversal of 90558220 is 2285509.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2263936 + ... + 2263975.

It is an arithmetic number, because the mean of its divisors is an integer number (15847692).

Almost surely, 2^90558220 is an apocalyptic number.

It is an amenable number.

90558220 is an abundant number, since it is smaller than the sum of its proper divisors (99614084).

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

90558220 is a wasteful number, since it uses less digits than its factorization.

90558220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4527920 (or 4527918 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 31.

The square root of 90558220 is about 9516.2082785109. The cubic root of 90558220 is about 449.0650877943.

The spelling of 90558220 in words is "ninety million, five hundred fifty-eight thousand, two hundred twenty".