643230 has 48 divisors (see below), whose sum is σ = 1913184. Its totient is φ = 146880.

The previous prime is 643217. The next prime is 643231. The reversal of 643230 is 32346.

643230 is a `hidden beast` number, since 643 + 23 + 0 = 666.

643230 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (643231) 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, 120 + ... + 1140.

It is an arithmetic number, because the mean of its divisors is an integer number (39858).

2⁶⁴³²³⁰ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 643230, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (956592).

643230 is an abundant number, since it is smaller than the sum of its proper divisors (1269954).

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

643230 is a wasteful number, since it uses less digits than its factorization.

643230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1041 (or 1038 counting only the distinct ones).

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

The square root of 643230 is about 802.0162093125. The cubic root of 643230 is about 86.3221198927.

Adding to 643230 its reverse (32346), we get a palindrome (675576).

The spelling of 643230 in words is "six hundred forty-three thousand, two hundred thirty".