209107044 has 36 divisors (see below), whose sum is σ = 531957244. Its totient is φ = 69256512.

The previous prime is 209107043. The next prime is 209107051. The reversal of 209107044 is 440701902.

It is a happy number.

209107044 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 110502144 + 98604900 = 10512^2 + 9930^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a plaindrome in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 209106999 and 209107017.

It is not an unprimeable number, because it can be changed into a prime (209107043) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12847 + ... + 24150.

Almost surely, 2^209107044 is an apocalyptic number.

It is an amenable number.

209107044 is an abundant number, since it is smaller than the sum of its proper divisors (322850200).

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

209107044 is a wasteful number, since it uses less digits than its factorization.

209107044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37164 (or 37159 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 209107044 is about 14460.5340150355. The cubic root of 209107044 is about 593.5485124793.

Adding to 209107044 its reverse (440701902), we get a palindrome (649808946).

The spelling of 209107044 in words is "two hundred nine million, one hundred seven thousand, forty-four".