490989 has 8 divisors (see below), whose sum is σ = 665632. Its totient is φ = 321840.

The previous prime is 490969. The next prime is 490991. The reversal of 490989 is 989094.

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

It is not a de Polignac number, because 490989 - 2⁵ = 490957 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Curzon number.

490989 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (490949) 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, 1159 + ... + 1524.

It is an arithmetic number, because the mean of its divisors is an integer number (83204).

2⁴⁹⁰⁹⁸⁹ is an apocalyptic number.

It is an amenable number.

490989 is a deficient number, since it is larger than the sum of its proper divisors (174643).

490989 is a wasteful number, since it uses less digits than its factorization.

490989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2747.

The product of its (nonzero) digits is 23328, while the sum is 39.

The square root of 490989 is about 700.7060724726. The cubic root of 490989 is about 78.8903568977.

The spelling of 490989 in words is "four hundred ninety thousand, nine hundred eighty-nine".