646425248 has 72 divisors (see below), whose sum is σ = 1498567392. Its totient is φ = 273646464.

The previous prime is 646425193. The next prime is 646425271. The reversal of 646425248 is 842524646.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 127661 + ... + 132627.

It is an arithmetic number, because the mean of its divisors is an integer number (20813436).

Almost surely, 2^646425248 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 646425248, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (749283696).

646425248 is an abundant number, since it is smaller than the sum of its proper divisors (852142144).

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

646425248 is a wasteful number, since it uses less digits than its factorization.

646425248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5074 (or 5059 counting only the distinct ones).

The product of its digits is 368640, while the sum is 41.

The square root of 646425248 is about 25424.8942574006. The cubic root of 646425248 is about 864.6481904331.

The spelling of 646425248 in words is "six hundred forty-six million, four hundred twenty-five thousand, two hundred forty-eight".