890090 has 8 divisors (see below), whose sum is σ = 1602180. Its totient is φ = 356032.

The previous prime is 890083. The next prime is 890107. The reversal of 890090 is 90098.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 889249 + 841 = 943^2 + 29^2 .

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

It is an unprimeable number.

890090 is an untouchable number, because it is not equal to the sum of proper divisors of any 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 3 ways as a sum of consecutive naturals, for example, 44495 + ... + 44514.

2⁸⁹⁰⁰⁹⁰ is an apocalyptic number.

890090 is a deficient number, since it is larger than the sum of its proper divisors (712090).

890090 is a wasteful number, since it uses less digits than its factorization.

890090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89016.

The product of its (nonzero) digits is 648, while the sum is 26.

The square root of 890090 is about 943.4458119044. The cubic root of 890090 is about 96.1932594116.

The spelling of 890090 in words is "eight hundred ninety thousand, ninety".