490378664 has 8 divisors (see below), whose sum is σ = 919460010. Its totient is φ = 245189328.

The previous prime is 490378663. The next prime is 490378673. The reversal of 490378664 is 466873094.

It can be written as a sum of positive squares in only one way, i.e., 272580100 + 217798564 = 16510^2 + 14758^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (490378663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30648659 + ... + 30648674.

Almost surely, 2^490378664 is an apocalyptic number.

It is an amenable number.

490378664 is a deficient number, since it is larger than the sum of its proper divisors (429081346).

490378664 is a wasteful number, since it uses less digits than its factorization.

490378664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61297339 (or 61297335 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 47.

The square root of 490378664 is about 22144.4951172972. The cubic root of 490378664 is about 788.5765447478.

The spelling of 490378664 in words is "four hundred ninety million, three hundred seventy-eight thousand, six hundred sixty-four".