648244812 has 72 divisors (see below), whose sum is σ = 1608563712. Its totient is φ = 203148000.

The previous prime is 648244783. The next prime is 648244819. The reversal of 648244812 is 218442846.

648244812 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (648244819) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 653637 + ... + 654627.

Almost surely, 2^648244812 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 648244812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (804281856).

648244812 is an abundant number, since it is smaller than the sum of its proper divisors (960318900).

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

648244812 is a wasteful number, since it uses less digits than its factorization.

648244812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1187 (or 1166 counting only the distinct ones).

The product of its digits is 98304, while the sum is 39.

The square root of 648244812 is about 25460.6522304516. The cubic root of 648244812 is about 865.4587037730.

The spelling of 648244812 in words is "six hundred forty-eight million, two hundred forty-four thousand, eight hundred twelve".