90290 has 8 divisors (see below), whose sum is σ = 162540. Its totient is φ = 36112.

The previous prime is 90289. The next prime is 90313. The reversal of 90290 is 9209.

It can be written as a sum of positive squares in 2 ways, for example, as 82369 + 7921 = 287^2 + 89^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4505 + ... + 4524.

2⁹⁰²⁹⁰ is an apocalyptic number.

90290 is a deficient number, since it is larger than the sum of its proper divisors (72250).

90290 is a wasteful number, since it uses less digits than its factorization.

90290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9036.

The product of its (nonzero) digits is 162, while the sum is 20.

The square root of 90290 is about 300.4829446075. The cubic root of 90290 is about 44.8621294654.

Adding to 90290 its reverse (9209), we get a palindrome (99499).

The spelling of 90290 in words is "ninety thousand, two hundred ninety".