209875340 has 24 divisors (see below), whose sum is σ = 441029232. Its totient is φ = 83894720.

The previous prime is 209875339. The next prime is 209875343. The reversal of 209875340 is 43578902.

It is a junction number, because it is equal to n+sod(n) for n = 209875294 and 209875303.

It is not an unprimeable number, because it can be changed into a prime (209875343) 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 7 ways as a sum of consecutive naturals, for example, 42395 + ... + 47085.

It is an arithmetic number, because the mean of its divisors is an integer number (18376218).

Almost surely, 2^209875340 is an apocalyptic number.

209875340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

209875340 is an abundant number, since it is smaller than the sum of its proper divisors (231153892).

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

209875340 is a wasteful number, since it uses less digits than its factorization.

209875340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6937 (or 6935 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 38.

The square root of 209875340 is about 14487.0749290531. The cubic root of 209875340 is about 594.2745578197.

The spelling of 209875340 in words is "two hundred nine million, eight hundred seventy-five thousand, three hundred forty".