206228906 has 8 divisors (see below), whose sum is σ = 333139044. Its totient is φ = 95182560.

The previous prime is 206228899. The next prime is 206228909. The reversal of 206228906 is 609822602.

206228906 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 199515625 + 6713281 = 14125^2 + 2591^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (206228909) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3965915 + ... + 3965966.

Almost surely, 2^206228906 is an apocalyptic number.

206228906 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

206228906 is a deficient number, since it is larger than the sum of its proper divisors (126910138).

206228906 is a wasteful number, since it uses less digits than its factorization.

206228906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7931896.

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 206228906 is about 14360.6721987517. The cubic root of 206228906 is about 590.8127322785.

The spelling of 206228906 in words is "two hundred six million, two hundred twenty-eight thousand, nine hundred six".