649843306 has 16 divisors (see below), whose sum is σ = 1114516224. Its totient is φ = 278379504.

The previous prime is 649843303. The next prime is 649843307. The reversal of 649843306 is 603348946.

It is not an unprimeable number, because it can be changed into a prime (649843303) by changing a digit.

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, 26476 + ... + 44728.

It is an arithmetic number, because the mean of its divisors is an integer number (69657264).

Almost surely, 2^649843306 is an apocalyptic number.

649843306 is a deficient number, since it is larger than the sum of its proper divisors (464672918).

649843306 is a wasteful number, since it uses less digits than its factorization.

649843306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20805.

The product of its (nonzero) digits is 373248, while the sum is 43.

The square root of 649843306 is about 25492.0243605721. The cubic root of 649843306 is about 866.1694923261.

The spelling of 649843306 in words is "six hundred forty-nine million, eight hundred forty-three thousand, three hundred six".