209828404 has 12 divisors (see below), whose sum is σ = 367567200. Its totient is φ = 104809208.

The previous prime is 209828387. The next prime is 209828417. The reversal of 209828404 is 404828902.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21664 + ... + 29815.

It is an arithmetic number, because the mean of its divisors is an integer number (30630600).

Almost surely, 2^209828404 is an apocalyptic number.

It is an amenable number.

209828404 is a deficient number, since it is larger than the sum of its proper divisors (157738796).

209828404 is a wasteful number, since it uses less digits than its factorization.

209828404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52502 (or 52500 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 37.

The square root of 209828404 is about 14485.4549117382. The cubic root of 209828404 is about 594.2302538212.

The spelling of 209828404 in words is "two hundred nine million, eight hundred twenty-eight thousand, four hundred four".