209416852 has 24 divisors (see below), whose sum is σ = 372493800. Its totient is φ = 102998016.

The previous prime is 209416813. The next prime is 209416853. The reversal of 209416852 is 258614902.

It can be written as a sum of positive squares in 4 ways, for example, as 13808656 + 195608196 = 3716^2 + 13986^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (209416853) 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, 147924 + ... + 149332.

It is an arithmetic number, because the mean of its divisors is an integer number (15520575).

Almost surely, 2^209416852 is an apocalyptic number.

It is an amenable number.

209416852 is a deficient number, since it is larger than the sum of its proper divisors (163076948).

209416852 is a wasteful number, since it uses less digits than its factorization.

209416852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1995 (or 1993 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 209416852 is about 14471.2422410794. The cubic root of 209416852 is about 593.8414969319.

The spelling of 209416852 in words is "two hundred nine million, four hundred sixteen thousand, eight hundred fifty-two".