206428222 has 64 divisors (see below), whose sum is σ = 420424704. Its totient is φ = 73405440.

The previous prime is 206428129. The next prime is 206428237. The reversal of 206428222 is 222824602.

It is a super-2 number, since 2×206428222² = 85225221676162568, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 193663 + ... + 194725.

It is an arithmetic number, because the mean of its divisors is an integer number (6569136).

Almost surely, 2^206428222 is an apocalyptic number.

206428222 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

206428222 is an abundant number, since it is smaller than the sum of its proper divisors (213996482).

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

206428222 is a wasteful number, since it uses less digits than its factorization.

206428222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1193.

The product of its (nonzero) digits is 6144, while the sum is 28.

The square root of 206428222 is about 14367.6101701014. The cubic root of 206428222 is about 591.0030071146.

The spelling of 206428222 in words is "two hundred six million, four hundred twenty-eight thousand, two hundred twenty-two".