490978860 has 24 divisors (see below), whose sum is σ = 1374740976. Its totient is φ = 130927680.

The previous prime is 490978849. The next prime is 490978897. The reversal of 490978860 is 68879094.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4091431 + ... + 4091550.

It is an arithmetic number, because the mean of its divisors is an integer number (57280874).

Almost surely, 2^490978860 is an apocalyptic number.

It is an amenable number.

490978860 is an abundant number, since it is smaller than the sum of its proper divisors (883762116).

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

490978860 is a wasteful number, since it uses less digits than its factorization.

490978860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8182993 (or 8182991 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 51.

The square root of 490978860 is about 22158.0427836034. The cubic root of 490978860 is about 788.8981380770.

The spelling of 490978860 in words is "four hundred ninety million, nine hundred seventy-eight thousand, eight hundred sixty".