649667792 has 20 divisors (see below), whose sum is σ = 1259356896. Its totient is φ = 324672480.

The previous prime is 649667783. The next prime is 649667803. The reversal of 649667792 is 297766946.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27317 + ... + 45227.

Almost surely, 2^649667792 is an apocalyptic number.

It is an amenable number.

649667792 is a deficient number, since it is larger than the sum of its proper divisors (609689104).

649667792 is a wasteful number, since it uses less digits than its factorization.

649667792 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20186 (or 20180 counting only the distinct ones).

The product of its digits is 6858432, while the sum is 56.

The square root of 649667792 is about 25488.5816003951. The cubic root of 649667792 is about 866.0915050331.

The spelling of 649667792 in words is "six hundred forty-nine million, six hundred sixty-seven thousand, seven hundred ninety-two".