208989828636 has 24 divisors (see below), whose sum is σ = 487936210944. Its totient is φ = 69621379440.

The previous prime is 208989828587. The next prime is 208989828643. The reversal of 208989828636 is 636828989802.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 5216310 + ... + 5256221.

It is an arithmetic number, because the mean of its divisors is an integer number (20330675456).

Almost surely, 2^208989828636 is an apocalyptic number.

It is an amenable number.

208989828636 is an abundant number, since it is smaller than the sum of its proper divisors (278946382308).

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

208989828636 is a wasteful number, since it uses less digits than its factorization.

208989828636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10474201 (or 10474199 counting only the distinct ones).

The product of its (nonzero) digits is 143327232, while the sum is 69.

The spelling of 208989828636 in words is "two hundred eight billion, nine hundred eighty-nine million, eight hundred twenty-eight thousand, six hundred thirty-six".