490659688 has 8 divisors (see below), whose sum is σ = 919986930. Its totient is φ = 245329840.

The previous prime is 490659683. The next prime is 490659703. The reversal of 490659688 is 886956094.

It can be written as a sum of positive squares in only one way, i.e., 462336004 + 28323684 = 21502^2 + 5322^2 .

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 (490659683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30666223 + ... + 30666238.

Almost surely, 2^490659688 is an apocalyptic number.

It is an amenable number.

490659688 is a deficient number, since it is larger than the sum of its proper divisors (429327242).

490659688 is a wasteful number, since it uses less digits than its factorization.

490659688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61332467 (or 61332463 counting only the distinct ones).

The product of its (nonzero) digits is 3732480, while the sum is 55.

The square root of 490659688 is about 22150.8394423327. The cubic root of 490659688 is about 788.7271539483.

The spelling of 490659688 in words is "four hundred ninety million, six hundred fifty-nine thousand, six hundred eighty-eight".