490636660 has 48 divisors (see below), whose sum is σ = 1093538880. Its totient is φ = 184271360.

The previous prime is 490636651. The next prime is 490636669. The reversal of 490636660 is 66636094.

It is an interprime number because it is at equal distance from previous prime (490636651) and next prime (490636669).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (490636669) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 165471 + ... + 168409.

It is an arithmetic number, because the mean of its divisors is an integer number (22782060).

Almost surely, 2^490636660 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 490636660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (546769440).

490636660 is an abundant number, since it is smaller than the sum of its proper divisors (602902220).

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

490636660 is a wasteful number, since it uses less digits than its factorization.

490636660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3456 (or 3454 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 40.

The square root of 490636660 is about 22150.3196365199. The cubic root of 490636660 is about 788.7148147150.

The spelling of 490636660 in words is "four hundred ninety million, six hundred thirty-six thousand, six hundred sixty".