490666879 has 16 divisors (see below), whose sum is σ = 514641600. Its totient is φ = 467368704.

The previous prime is 490666829. The next prime is 490666901. The reversal of 490666879 is 978666094.

It is a cyclic number.

It is not a de Polignac number, because 490666879 - 2¹⁷ = 490535807 is a prime.

It is a super-2 number, since 2×490666879² = 481507972295201282, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (490666819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 358254 + ... + 359620.

It is an arithmetic number, because the mean of its divisors is an integer number (32165100).

Almost surely, 2^490666879 is an apocalyptic number.

490666879 is a deficient number, since it is larger than the sum of its proper divisors (23974721).

490666879 is a wasteful number, since it uses less digits than its factorization.

490666879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1602.

The product of its (nonzero) digits is 3919104, while the sum is 55.

The square root of 490666879 is about 22151.0017606428. The cubic root of 490666879 is about 788.7310070664.

It can be divided in two parts, 49066 and 6879, that added together give a triangular number (55945 = T₃₃₄).

The spelling of 490666879 in words is "four hundred ninety million, six hundred sixty-six thousand, eight hundred seventy-nine".