209724852 has 24 divisors (see below), whose sum is σ = 518144256. Its totient is φ = 65795968.

The previous prime is 209724847. The next prime is 209724859. The reversal of 209724852 is 258427902.

It is a self number, because there is not a number n which added to its sum of digits gives 209724852.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (209724859) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 513828 + ... + 514235.

It is an arithmetic number, because the mean of its divisors is an integer number (21589344).

Almost surely, 2^209724852 is an apocalyptic number.

It is an amenable number.

209724852 is an abundant number, since it is smaller than the sum of its proper divisors (308419404).

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

209724852 is a wasteful number, since it uses less digits than its factorization.

209724852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1028087 (or 1028085 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 39.

The square root of 209724852 is about 14481.8801265582. The cubic root of 209724852 is about 594.1324852711.

The spelling of 209724852 in words is "two hundred nine million, seven hundred twenty-four thousand, eight hundred fifty-two".