643060 has 48 divisors (see below), whose sum is σ = 1532160. Its totient is φ = 224640.

The previous prime is 643051. The next prime is 643061. The reversal of 643060 is 60346.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (643061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8101 + ... + 8179.

It is an arithmetic number, because the mean of its divisors is an integer number (31920).

2⁶⁴³⁰⁶⁰ 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 643060, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (766080).

643060 is an abundant number, since it is smaller than the sum of its proper divisors (889100).

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

643060 is a wasteful number, since it uses less digits than its factorization.

643060 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136 (or 134 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 643060 is about 801.9102194136. The cubic root of 643060 is about 86.3145144984.

The spelling of 643060 in words is "six hundred forty-three thousand, sixty".