90229290 has 64 divisors (see below), whose sum is σ = 231897600. Its totient is φ = 22400064.

The previous prime is 90229283. The next prime is 90229301. The reversal of 90229290 is 9292209.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 32289 + ... + 34971.

It is an arithmetic number, because the mean of its divisors is an integer number (3623400).

Almost surely, 2^90229290 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 90229290, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (115948800).

90229290 is an abundant number, since it is smaller than the sum of its proper divisors (141668310).

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

90229290 is a wasteful number, since it uses less digits than its factorization.

90229290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2771.

The product of its (nonzero) digits is 5832, while the sum is 33.

The square root of 90229290 is about 9498.9099374612. The cubic root of 90229290 is about 448.5207227729.

The spelling of 90229290 in words is "ninety million, two hundred twenty-nine thousand, two hundred ninety".