200643436 has 36 divisors (see below), whose sum is σ = 409374000. Its totient is φ = 85796256.

The previous prime is 200643419. The next prime is 200643451. The reversal of 200643436 is 634346002.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 116550 + ... + 118258.

It is an arithmetic number, because the mean of its divisors is an integer number (11371500).

Almost surely, 2^200643436 is an apocalyptic number.

It is an amenable number.

200643436 is an abundant number, since it is smaller than the sum of its proper divisors (208730564).

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

200643436 is a wasteful number, since it uses less digits than its factorization.

200643436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2326 (or 2317 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 28.

The square root of 200643436 is about 14164.8662542221. The cubic root of 200643436 is about 585.4300157277.

Adding to 200643436 its reverse (634346002), we get a palindrome (834989438).

The spelling of 200643436 in words is "two hundred million, six hundred forty-three thousand, four hundred thirty-six".