493660646 has 16 divisors (see below), whose sum is σ = 759075840. Its totient is φ = 240674760.

The previous prime is 493660633. The next prime is 493660681. The reversal of 493660646 is 646066394.

It is a junction number, because it is equal to n+sod(n) for n = 493660597 and 493660606.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15785 + ... + 35163.

It is an arithmetic number, because the mean of its divisors is an integer number (47442240).

Almost surely, 2^493660646 is an apocalyptic number.

493660646 is a deficient number, since it is larger than the sum of its proper divisors (265415194).

493660646 is a wasteful number, since it uses less digits than its factorization.

493660646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19699.

The product of its (nonzero) digits is 559872, while the sum is 44.

The square root of 493660646 is about 22218.4753302291. The cubic root of 493660646 is about 790.3318832005.

The spelling of 493660646 in words is "four hundred ninety-three million, six hundred sixty thousand, six hundred forty-six".