646863224 has 64 divisors (see below), whose sum is σ = 1452556800. Its totient is φ = 264046464.

The previous prime is 646863223. The next prime is 646863229. The reversal of 646863224 is 422368646.

646863224 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646863223) 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, 345539 + ... + 347405.

It is an arithmetic number, because the mean of its divisors is an integer number (22696200).

Almost surely, 2^646863224 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 646863224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (726278400).

646863224 is an abundant number, since it is smaller than the sum of its proper divisors (805693576).

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

646863224 is a wasteful number, since it uses less digits than its factorization.

646863224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2172 (or 2168 counting only the distinct ones).

The product of its digits is 331776, while the sum is 41.

The square root of 646863224 is about 25433.5059321361. The cubic root of 646863224 is about 864.8434229382.

The spelling of 646863224 in words is "six hundred forty-six million, eight hundred sixty-three thousand, two hundred twenty-four".