209930832 has 80 divisors (see below), whose sum is σ = 611657280. Its totient is φ = 68923008.

The previous prime is 209930813. The next prime is 209930837. The reversal of 209930832 is 238039902.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (209930837) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25318 + ... + 32570.

It is an arithmetic number, because the mean of its divisors is an integer number (7645716).

Almost surely, 2^209930832 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 209930832, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (305828640).

209930832 is an abundant number, since it is smaller than the sum of its proper divisors (401726448).

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

209930832 is a wasteful number, since it uses less digits than its factorization.

209930832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7337 (or 7325 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 209930832 is about 14488.9900269135. The cubic root of 209930832 is about 594.3269295081.

The spelling of 209930832 in words is "two hundred nine million, nine hundred thirty thousand, eight hundred thirty-two".