209803028 has 12 divisors (see below), whose sum is σ = 367987200. Its totient is φ = 104663832.

The previous prime is 209803021. The next prime is 209803049. The reversal of 209803028 is 820308902.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 209802985 and 209803003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (209803021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57428 + ... + 60971.

It is an arithmetic number, because the mean of its divisors is an integer number (30665600).

Almost surely, 2^209803028 is an apocalyptic number.

It is an amenable number.

209803028 is a deficient number, since it is larger than the sum of its proper divisors (158184172).

209803028 is a wasteful number, since it uses less digits than its factorization.

209803028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118846 (or 118844 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 209803028 is about 14484.5789721345. The cubic root of 209803028 is about 594.2062980641.

The spelling of 209803028 in words is "two hundred nine million, eight hundred three thousand, twenty-eight".