490890 has 16 divisors (see below), whose sum is σ = 1178208. Its totient is φ = 130896.

The previous prime is 490877. The next prime is 490891. The reversal of 490890 is 98094.

490890 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 16363 = 490890 / (4 + 9 + 0 + 8 + 9 + 0).

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 490890.

It is not an unprimeable number, because it can be changed into a prime (490891) by changing a digit.

490890 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 7 ways as a sum of consecutive naturals, for example, 8152 + ... + 8211.

It is an arithmetic number, because the mean of its divisors is an integer number (73638).

2⁴⁹⁰⁸⁹⁰ is an apocalyptic number.

490890 is an abundant number, since it is smaller than the sum of its proper divisors (687318).

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

490890 is a wasteful number, since it uses less digits than its factorization.

490890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16373.

The product of its (nonzero) digits is 2592, while the sum is 30.

The square root of 490890 is about 700.6354258814. The cubic root of 490890 is about 78.8850542193.

The spelling of 490890 in words is "four hundred ninety thousand, eight hundred ninety".