209552828 has 6 divisors (see below), whose sum is σ = 366717456. Its totient is φ = 104776412.

The previous prime is 209552821. The next prime is 209552857. The reversal of 209552828 is 828255902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (209552821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26194100 + ... + 26194107.

It is an arithmetic number, because the mean of its divisors is an integer number (61119576).

Almost surely, 2^209552828 is an apocalyptic number.

It is an amenable number.

209552828 is a deficient number, since it is larger than the sum of its proper divisors (157164628).

209552828 is a wasteful number, since it uses less digits than its factorization.

209552828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52388211 (or 52388209 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 41.

The square root of 209552828 is about 14475.9396240797. The cubic root of 209552828 is about 593.9699977667.

The spelling of 209552828 in words is "two hundred nine million, five hundred fifty-two thousand, eight hundred twenty-eight".