200640642 has 8 divisors (see below), whose sum is σ = 401281296. Its totient is φ = 66880212.

The previous prime is 200640637. The next prime is 200640667. The reversal of 200640642 is 246046002.

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

200640642 is an admirable number.

It is an unprimeable number.

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, 16720048 + ... + 16720059.

It is an arithmetic number, because the mean of its divisors is an integer number (50160162).

Almost surely, 2^200640642 is an apocalyptic number.

200640642 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

200640642 is a wasteful number, since it uses less digits than its factorization.

200640642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33440112.

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 200640642 is about 14164.7676295801. The cubic root of 200640642 is about 585.4272983051.

Adding to 200640642 its reverse (246046002), we get a palindrome (446686644).

The spelling of 200640642 in words is "two hundred million, six hundred forty thousand, six hundred forty-two".