490985636 has 12 divisors (see below), whose sum is σ = 909767628. Its totient is φ = 231052032.

The previous prime is 490985633. The next prime is 490985639. The reversal of 490985636 is 636589094.

It is an interprime number because it is at equal distance from previous prime (490985633) and next prime (490985639).

It can be written as a sum of positive squares in 2 ways, for example, as 353064100 + 137921536 = 18790^2 + 11744^2 .

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

It is not an unprimeable number, because it can be changed into a prime (490985633) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3610121 + ... + 3610256.

It is an arithmetic number, because the mean of its divisors is an integer number (75813969).

Almost surely, 2^490985636 is an apocalyptic number.

It is an amenable number.

490985636 is a deficient number, since it is larger than the sum of its proper divisors (418781992).

490985636 is a wasteful number, since it uses less digits than its factorization.

490985636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7220398 (or 7220396 counting only the distinct ones).

The product of its (nonzero) digits is 1399680, while the sum is 50.

The square root of 490985636 is about 22158.1956846671. The cubic root of 490985636 is about 788.9017672551.

The spelling of 490985636 in words is "four hundred ninety million, nine hundred eighty-five thousand, six hundred thirty-six".