209803968 has 84 divisors (see below), whose sum is σ = 656054568. Its totient is φ = 63575040.

The previous prime is 209803961. The next prime is 209803981. The reversal of 209803968 is 869308902.

It is not an unprimeable number, because it can be changed into a prime (209803961) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10221 + ... + 22892.

Almost surely, 2^209803968 is an apocalyptic number.

It is an amenable number.

209803968 is an abundant number, since it is smaller than the sum of its proper divisors (446250600).

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

209803968 is a wasteful number, since it uses less digits than its factorization.

209803968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33142 (or 33129 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 45.

The square root of 209803968 is about 14484.6114204006. The cubic root of 209803968 is about 594.2071854887.

The spelling of 209803968 in words is "two hundred nine million, eight hundred three thousand, nine hundred sixty-eight".