209148368 has 40 divisors (see below), whose sum is σ = 476073696. Its totient is φ = 87753600.

The previous prime is 209148349. The next prime is 209148389. The reversal of 209148368 is 863841902.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43418 + ... + 47993.

Almost surely, 2^209148368 is an apocalyptic number.

It is an amenable number.

209148368 is an abundant number, since it is smaller than the sum of its proper divisors (266925328).

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

209148368 is a wasteful number, since it uses less digits than its factorization.

209148368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91443 (or 91437 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 41.

The square root of 209148368 is about 14461.9627990118. The cubic root of 209148368 is about 593.5876091746.

The spelling of 209148368 in words is "two hundred nine million, one hundred forty-eight thousand, three hundred sixty-eight".