649738910 has 16 divisors (see below), whose sum is σ = 1209859200. Its totient is φ = 250933536.

The previous prime is 649738871. The next prime is 649738913. The reversal of 649738910 is 19837946.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649738913) 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, 1119950 + ... + 1120529.

It is an arithmetic number, because the mean of its divisors is an integer number (75616200).

Almost surely, 2^649738910 is an apocalyptic number.

649738910 is a deficient number, since it is larger than the sum of its proper divisors (560120290).

649738910 is a wasteful number, since it uses less digits than its factorization.

649738910 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2240515.

The product of its (nonzero) digits is 326592, while the sum is 47.

The square root of 649738910 is about 25489.9766575021. The cubic root of 649738910 is about 866.1231070554.

The spelling of 649738910 in words is "six hundred forty-nine million, seven hundred thirty-eight thousand, nine hundred ten".