643260 has 48 divisors (see below), whose sum is σ = 1838592. Its totient is φ = 168000.

The previous prime is 643243. The next prime is 643273. The reversal of 643260 is 62346.

643260 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 an unprimeable number.

643260 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4185 + ... + 4335.

It is an arithmetic number, because the mean of its divisors is an integer number (38304).

2⁶⁴³²⁶⁰ is an apocalyptic number.

643260 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 643260, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (919296).

643260 is an abundant number, since it is smaller than the sum of its proper divisors (1195332).

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

643260 is a wasteful number, since it uses less digits than its factorization.

643260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234 (or 232 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 643260 is about 802.0349119583. The cubic root of 643260 is about 86.3234618821.

It can be divided in two parts, 643 and 260, that added together give a triangular number (903 = T₄₂).

The spelling of 643260 in words is "six hundred forty-three thousand, two hundred sixty".