209438912 has 28 divisors (see below), whose sum is σ = 440055000. Its totient is φ = 98558976.

The previous prime is 209438903. The next prime is 209438921. The reversal of 209438912 is 219834902.

It is an interprime number because it is at equal distance from previous prime (209438903) and next prime (209438921).

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 95162 + ... + 97337.

It is an arithmetic number, because the mean of its divisors is an integer number (15716250).

Almost surely, 2^209438912 is an apocalyptic number.

It is an amenable number.

209438912 is an abundant number, since it is smaller than the sum of its proper divisors (230616088).

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

209438912 is a wasteful number, since it uses less digits than its factorization.

209438912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192528 (or 192518 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 209438912 is about 14472.0044223321. The cubic root of 209438912 is about 593.8623479814.

The spelling of 209438912 in words is "two hundred nine million, four hundred thirty-eight thousand, nine hundred twelve".