90022290 has 16 divisors (see below), whose sum is σ = 216053568. Its totient is φ = 24005936.

The previous prime is 90022279. The next prime is 90022291. The reversal of 90022290 is 9222009.

It is a self number, because there is not a number n which added to its sum of digits gives 90022290.

It is not an unprimeable number, because it can be changed into a prime (90022291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1500342 + ... + 1500401.

It is an arithmetic number, because the mean of its divisors is an integer number (13503348).

Almost surely, 2^90022290 is an apocalyptic number.

90022290 is an abundant number, since it is smaller than the sum of its proper divisors (126031278).

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

90022290 is a wasteful number, since it uses less digits than its factorization.

90022290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3000753.

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 90022290 is about 9488.0076939261. The cubic root of 90022290 is about 448.1774680877.

Adding to 90022290 its reverse (9222009), we get a palindrome (99244299).

The spelling of 90022290 in words is "ninety million, twenty-two thousand, two hundred ninety".