649590768 has 60 divisors (see below), whose sum is σ = 1822114528. Its totient is φ = 216034560.

The previous prime is 649590743. The next prime is 649590779. The reversal of 649590768 is 867095946.

649590768 is a `hidden beast` number, since 6 + 49 + 590 + 7 + 6 + 8 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 60873 + ... + 70743.

Almost surely, 2^649590768 is an apocalyptic number.

It is an amenable number.

649590768 is an abundant number, since it is smaller than the sum of its proper divisors (1172523760).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

649590768 is a wasteful number, since it uses less digits than its factorization.

649590768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10342 (or 10333 counting only the distinct ones).

The product of its (nonzero) digits is 3265920, while the sum is 54.

The square root of 649590768 is about 25487.0706045242. The cubic root of 649590768 is about 866.0572760166.

The spelling of 649590768 in words is "six hundred forty-nine million, five hundred ninety thousand, seven hundred sixty-eight".