649193216 has 144 divisors (see below), whose sum is σ = 1628659200. Its totient is φ = 251817984.

The previous prime is 649193203. The next prime is 649193219. The reversal of 649193216 is 612391946.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649193219) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 782690 + ... + 783518.

Almost surely, 2^649193216 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 649193216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (814329600).

649193216 is an abundant number, since it is smaller than the sum of its proper divisors (979465984).

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

649193216 is a wasteful number, since it uses less digits than its factorization.

649193216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 894 (or 880 counting only the distinct ones).

The product of its digits is 69984, while the sum is 41.

The square root of 649193216 is about 25479.2703192223. The cubic root of 649193216 is about 865.8805631890.

The spelling of 649193216 in words is "six hundred forty-nine million, one hundred ninety-three thousand, two hundred sixteen".