490657 has 8 divisors (see below), whose sum is σ = 513000. Its totient is φ = 468864.

The previous prime is 490643. The next prime is 490661. The reversal of 490657 is 756094.

It can be written as a sum of positive squares in 4 ways, for example, as 26896 + 463761 = 164^2 + 681^2 .

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

It is not a de Polignac number, because 490657 - 2¹⁵ = 457889 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (490627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3219 + ... + 3367.

It is an arithmetic number, because the mean of its divisors is an integer number (64125).

2⁴⁹⁰⁶⁵⁷ is an apocalyptic number.

It is an amenable number.

490657 is a deficient number, since it is larger than the sum of its proper divisors (22343).

490657 is a wasteful number, since it uses less digits than its factorization.

490657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 490657 is about 700.4691285132. The cubic root of 490657 is about 78.8725713641.

The spelling of 490657 in words is "four hundred ninety thousand, six hundred fifty-seven".