648921344 has 36 divisors (see below), whose sum is σ = 1300597200. Its totient is φ = 323136000.

The previous prime is 648921341. The next prime is 648921389. The reversal of 648921344 is 443129846.

It is not an unprimeable number, because it can be changed into a prime (648921341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59207 + ... + 69305.

It is an arithmetic number, because the mean of its divisors is an integer number (36127700).

Almost surely, 2^648921344 is an apocalyptic number.

648921344 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 648921344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (650298600).

648921344 is an abundant number, since it is smaller than the sum of its proper divisors (651675856).

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

648921344 is a wasteful number, since it uses less digits than its factorization.

648921344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10366 (or 10352 counting only the distinct ones).

The product of its digits is 165888, while the sum is 41.

The square root of 648921344 is about 25473.9345999003. The cubic root of 648921344 is about 865.7596738840.

The spelling of 648921344 in words is "six hundred forty-eight million, nine hundred twenty-one thousand, three hundred forty-four".