90090120 has 64 divisors (see below), whose sum is σ = 276877440. Its totient is φ = 23436800.

The previous prime is 90090101. The next prime is 90090131. The reversal of 90090120 is 2109009.

It is a happy number.

It is a super-2 number, since 2×90090120² = 16232459443228800, which contains 22 as substring.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 4236 + ... + 14075.

It is an arithmetic number, because the mean of its divisors is an integer number (4326210).

Almost surely, 2^90090120 is an apocalyptic number.

It is an amenable number.

90090120 is an abundant number, since it is smaller than the sum of its proper divisors (186787320).

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

90090120 is a wasteful number, since it uses less digits than its factorization.

90090120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18366 (or 18362 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 21.

The square root of 90090120 is about 9491.5815331271. The cubic root of 90090120 is about 448.2900040890.

Adding to 90090120 its reverse (2109009), we get a palindrome (92199129).

The spelling of 90090120 in words is "ninety million, ninety thousand, one hundred twenty".