490840864 has 24 divisors (see below), whose sum is σ = 1023187788. Its totient is φ = 230983680.

The previous prime is 490840849. The next prime is 490840871. The reversal of 490840864 is 468048094.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 444872464 + 45968400 = 21092^2 + 6780^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 490840864.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 450597 + ... + 451684.

Almost surely, 2^490840864 is an apocalyptic number.

It is an amenable number.

490840864 is an abundant number, since it is smaller than the sum of its proper divisors (532346924).

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

490840864 is a wasteful number, since it uses less digits than its factorization.

490840864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 902308 (or 902300 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 43.

The square root of 490840864 is about 22154.9286615868. The cubic root of 490840864 is about 788.8242211210.

The spelling of 490840864 in words is "four hundred ninety million, eight hundred forty thousand, eight hundred sixty-four".