206478 has 12 divisors (see below), whose sum is σ = 447408. Its totient is φ = 68820.

The previous prime is 206477. The next prime is 206483. The reversal of 206478 is 874602.

206478 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 inconsummate number, since it does not exist a number n which divided by its sum of digits gives 206478.

It is not an unprimeable number, because it can be changed into a prime (206477) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5718 + ... + 5753.

It is an arithmetic number, because the mean of its divisors is an integer number (37284).

2²⁰⁶⁴⁷⁸ is an apocalyptic number.

206478 is an abundant number, since it is smaller than the sum of its proper divisors (240930).

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

206478 is a wasteful number, since it uses less digits than its factorization.

206478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11479 (or 11476 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 206478 is about 454.3985035187. The cubic root of 206478 is about 59.1050508022.

The spelling of 206478 in words is "two hundred six thousand, four hundred seventy-eight".