643302 has 60 divisors (see below), whose sum is σ = 1659636. Its totient is φ = 184680.

The previous prime is 643301. The next prime is 643303. The reversal of 643302 is 203346.

643302 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (643301) and next prime (643303).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (643301) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 33849 + ... + 33867.

2⁶⁴³³⁰² is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 643302, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (829818).

643302 is an abundant number, since it is smaller than the sum of its proper divisors (1016334).

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

643302 is a wasteful number, since it uses less digits than its factorization.

643302 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63 (or 35 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

The square root of 643302 is about 802.0610949298. The cubic root of 643302 is about 86.3253405970.

Adding to 643302 its reverse (203346), we get a palindrome (846648).

The spelling of 643302 in words is "six hundred forty-three thousand, three hundred two".