490865 has 8 divisors (see below), whose sum is σ = 620160. Its totient is φ = 371952.

The previous prime is 490859. The next prime is 490877. The reversal of 490865 is 568094.

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

It is a cyclic number.

It is not a de Polignac number, because 490865 - 2⁴ = 490849 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2489 + ... + 2678.

It is an arithmetic number, because the mean of its divisors is an integer number (77520).

2⁴⁹⁰⁸⁶⁵ is an apocalyptic number.

It is an amenable number.

490865 is a deficient number, since it is larger than the sum of its proper divisors (129295).

490865 is a wasteful number, since it uses less digits than its factorization.

490865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5191.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 490865 is about 700.6175847065. The cubic root of 490865 is about 78.8837150464.

The spelling of 490865 in words is "four hundred ninety thousand, eight hundred sixty-five".