649930688 has 168 divisors, whose sum is σ = 1532351520. Its totient is φ = 272588800.

The previous prime is 649930667. The next prime is 649930691. The reversal of 649930688 is 886039946.

649930688 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7302548 + ... + 7302636.

It is an arithmetic number, because the mean of its divisors is an integer number (9121140).

Almost surely, 2^649930688 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 649930688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (766175760).

649930688 is an abundant number, since it is smaller than the sum of its proper divisors (882420832).

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

649930688 is a wasteful number, since it uses less digits than its factorization.

649930688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187 (or 166 counting only the distinct ones).

The product of its (nonzero) digits is 2239488, while the sum is 53.

The square root of 649930688 is about 25493.7382115687. The cubic root of 649930688 is about 866.2083141106.

The spelling of 649930688 in words is "six hundred forty-nine million, nine hundred thirty thousand, six hundred eighty-eight".