648244828 has 48 divisors (see below), whose sum is σ = 1416973824. Its totient is φ = 252095040.

The previous prime is 648244819. The next prime is 648244829. The reversal of 648244828 is 828442846.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648244829) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 197650 + ... + 200902.

It is an arithmetic number, because the mean of its divisors is an integer number (29520288).

Almost surely, 2^648244828 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 648244828, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (708486912).

648244828 is an abundant number, since it is smaller than the sum of its proper divisors (768728996).

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

648244828 is a wasteful number, since it uses less digits than its factorization.

648244828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3922 (or 3920 counting only the distinct ones).

The product of its digits is 786432, while the sum is 46.

The square root of 648244828 is about 25460.6525446619. The cubic root of 648244828 is about 865.4587108935.

The spelling of 648244828 in words is "six hundred forty-eight million, two hundred forty-four thousand, eight hundred twenty-eight".