649933312 has 80 divisors (see below), whose sum is σ = 1520652672. Its totient is φ = 271687680.

The previous prime is 649933309. The next prime is 649933351. The reversal of 649933312 is 213339946.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 144733 + ... + 149155.

Almost surely, 2^649933312 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 649933312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (760326336).

649933312 is an abundant number, since it is smaller than the sum of its proper divisors (870719360).

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

649933312 is an equidigital number, since it uses as much as digits as its factorization.

649933312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4489 (or 4473 counting only the distinct ones).

The product of its digits is 104976, while the sum is 40.

The square root of 649933312 is about 25493.7896751346. The cubic root of 649933312 is about 866.2094798388.

The spelling of 649933312 in words is "six hundred forty-nine million, nine hundred thirty-three thousand, three hundred twelve".