643102304 has 48 divisors (see below), whose sum is σ = 1371813408. Its totient is φ = 295007232.

The previous prime is 643102279. The next prime is 643102331. The reversal of 643102304 is 403201346.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 643102304.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64844 + ... + 74100.

It is an arithmetic number, because the mean of its divisors is an integer number (28579446).

Almost surely, 2^643102304 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 643102304, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (685906704).

643102304 is an abundant number, since it is smaller than the sum of its proper divisors (728711104).

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

643102304 is a wasteful number, since it uses less digits than its factorization.

643102304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9447 (or 9439 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 643102304 is about 25359.4618239426. The cubic root of 643102304 is about 863.1640720369.

The spelling of 643102304 in words is "six hundred forty-three million, one hundred two thousand, three hundred four".