206354128 has 20 divisors (see below), whose sum is σ = 401411808. Its totient is φ = 102764000.

The previous prime is 206354089. The next prime is 206354129. The reversal of 206354128 is 821453602.

It is a super-2 number, since 2×206354128² = 85164052285280768, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 206354128.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206354129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21676 + ... + 29707.

Almost surely, 2^206354128 is an apocalyptic number.

It is an amenable number.

206354128 is a deficient number, since it is larger than the sum of its proper divisors (195057680).

206354128 is a wasteful number, since it uses less digits than its factorization.

206354128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51642 (or 51636 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 206354128 is about 14365.0314305260. The cubic root of 206354128 is about 590.9322883975.

The spelling of 206354128 in words is "two hundred six million, three hundred fifty-four thousand, one hundred twenty-eight".