209145832 has 48 divisors (see below), whose sum is σ = 476120160. Its totient is φ = 84354816.

The previous prime is 209145799. The next prime is 209145841. The reversal of 209145832 is 238541902.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9723 + ... + 22645.

It is an arithmetic number, because the mean of its divisors is an integer number (9919170).

Almost surely, 2^209145832 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 209145832, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (238060080).

209145832 is an abundant number, since it is smaller than the sum of its proper divisors (266974328).

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

209145832 is a wasteful number, since it uses less digits than its factorization.

209145832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12970 (or 12949 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 209145832 is about 14461.8751204676. The cubic root of 209145832 is about 593.5852100097.

The spelling of 209145832 in words is "two hundred nine million, one hundred forty-five thousand, eight hundred thirty-two".