490090 has 8 divisors (see below), whose sum is σ = 882180. Its totient is φ = 196032.

The previous prime is 490057. The next prime is 490097. The reversal of 490090 is 90094.

It can be written as a sum of positive squares in 2 ways, for example, as 400689 + 89401 = 633^2 + 299^2 .

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

It is a nialpdrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (490097) by changing a digit.

490090 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24495 + ... + 24514.

2⁴⁹⁰⁰⁹⁰ is an apocalyptic number.

490090 is a deficient number, since it is larger than the sum of its proper divisors (392090).

490090 is a wasteful number, since it uses less digits than its factorization.

490090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49016.

The product of its (nonzero) digits is 324, while the sum is 22.

The square root of 490090 is about 700.0642827627. The cubic root of 490090 is about 78.8421781122.

The spelling of 490090 in words is "four hundred ninety thousand, ninety".