209028799 has 16 divisors (see below), whose sum is σ = 249523200. Its totient is φ = 171357984.

The previous prime is 209028797. The next prime is 209028829. The reversal of 209028799 is 997820902.

It is not a de Polignac number, because 209028799 - 2¹ = 209028797 is a prime.

It is a super-2 number, since 2×209028799² = 87386077622764802, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (209028793) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 8442 + ... + 22120.

It is an arithmetic number, because the mean of its divisors is an integer number (15595200).

Almost surely, 2^209028799 is an apocalyptic number.

209028799 is a deficient number, since it is larger than the sum of its proper divisors (40494401).

209028799 is a wasteful number, since it uses less digits than its factorization.

209028799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13782.

The product of its (nonzero) digits is 163296, while the sum is 46.

The square root of 209028799 is about 14457.8282947336. The cubic root of 209028799 is about 593.4744706610.

The spelling of 209028799 in words is "two hundred nine million, twenty-eight thousand, seven hundred ninety-nine".