209874234 has 16 divisors (see below), whose sum is σ = 420723072. Its totient is φ = 69795648.

The previous prime is 209874233. The next prime is 209874239. The reversal of 209874234 is 432478902.

It is a junction number, because it is equal to n+sod(n) for n = 209874192 and 209874201.

It is not an unprimeable number, because it can be changed into a prime (209874233) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 37794 + ... + 42989.

It is an arithmetic number, because the mean of its divisors is an integer number (26295192).

Almost surely, 2^209874234 is an apocalyptic number.

209874234 is an abundant number, since it is smaller than the sum of its proper divisors (210848838).

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

209874234 is a wasteful number, since it uses less digits than its factorization.

209874234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81221.

The product of its (nonzero) digits is 96768, while the sum is 39.

The square root of 209874234 is about 14487.0367570459. The cubic root of 209874234 is about 594.2735139162.

The spelling of 209874234 in words is "two hundred nine million, eight hundred seventy-four thousand, two hundred thirty-four".