206402220 has 36 divisors (see below), whose sum is σ = 626087280. Its totient is φ = 55040544.

The previous prime is 206402201. The next prime is 206402249. The reversal of 206402220 is 22204602.

It is a happy number.

206402220 is a `hidden beast` number, since 2 + 0 + 640 + 2 + 2 + 20 = 666.

206402220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (36).

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

It is a junction number, because it is equal to n+sod(n) for n = 206402193 and 206402202.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 573160 + ... + 573519.

Almost surely, 2^206402220 is an apocalyptic number.

206402220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

206402220 is an abundant number, since it is smaller than the sum of its proper divisors (419685060).

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

206402220 is a wasteful number, since it uses less digits than its factorization.

206402220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1146694 (or 1146689 counting only the distinct ones).

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

The square root of 206402220 is about 14366.7052590356. The cubic root of 206402220 is about 590.9781915390.

Adding to 206402220 its reverse (22204602), we get a palindrome (228606822).

The spelling of 206402220 in words is "two hundred six million, four hundred two thousand, two hundred twenty".