649888000 has 144 divisors (see below), whose sum is σ = 1691254656. Its totient is φ = 248371200.

The previous prime is 649887919. The next prime is 649888021. The reversal of 649888000 is 888946.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 735559 + ... + 736441.

It is an arithmetic number, because the mean of its divisors is an integer number (11744824).

Almost surely, 2^649888000 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 649888000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (845627328).

649888000 is an abundant number, since it is smaller than the sum of its proper divisors (1041366656).

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

649888000 is an equidigital number, since it uses as much as digits as its factorization.

649888000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 937 (or 913 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 43.

The square root of 649888000 is about 25492.9009726237. The cubic root of 649888000 is about 866.1893492626.

The spelling of 649888000 in words is "six hundred forty-nine million, eight hundred eighty-eight thousand".