206442 has 16 divisors (see below), whose sum is σ = 458880. Its totient is φ = 68796.

The previous prime is 206419. The next prime is 206447. The reversal of 206442 is 244602.

206442 is a `hidden beast` number, since 20 + 644 + 2 = 666.

206442 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 not an unprimeable number, because it can be changed into a prime (206447) by changing a digit.

206442 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 7 ways as a sum of consecutive naturals, for example, 1858 + ... + 1965.

It is an arithmetic number, because the mean of its divisors is an integer number (28680).

2²⁰⁶⁴⁴² is an apocalyptic number.

206442 is an abundant number, since it is smaller than the sum of its proper divisors (252438).

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

206442 is a wasteful number, since it uses less digits than its factorization.

206442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3834 (or 3828 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 206442 is about 454.3588889853. The cubic root of 206442 is about 59.1016155605.

The spelling of 206442 in words is "two hundred six thousand, four hundred forty-two".