900490 has 16 divisors (see below), whose sum is σ = 1716552. Its totient is φ = 338944.

The previous prime is 900481. The next prime is 900491. The reversal of 900490 is 94009.

It can be written as a sum of positive squares in 4 ways, for example, as 881721 + 18769 = 939^2 + 137^2 .

It is not an unprimeable number, because it can be changed into a prime (900491) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2479 + ... + 2818.

2⁹⁰⁰⁴⁹⁰ is an apocalyptic number.

900490 is a deficient number, since it is larger than the sum of its proper divisors (816062).

900490 is a wasteful number, since it uses less digits than its factorization.

900490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5321.

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

The square root of 900490 is about 948.9415155846. The cubic root of 900490 is about 96.5664571260.

Adding to 900490 its reverse (94009), we get a palindrome (994499).

The spelling of 900490 in words is "nine hundred thousand, four hundred ninety".