209034438 has 32 divisors (see below), whose sum is σ = 435891456. Its totient is φ = 66769248.

The previous prime is 209034433. The next prime is 209034461. The reversal of 209034438 is 834430902.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 209034399 and 209034408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (209034433) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6031 + ... + 21317.

It is an arithmetic number, because the mean of its divisors is an integer number (13621608).

Almost surely, 2^209034438 is an apocalyptic number.

209034438 is an abundant number, since it is smaller than the sum of its proper divisors (226857018).

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

209034438 is a wasteful number, since it uses less digits than its factorization.

209034438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15388.

The product of its (nonzero) digits is 20736, while the sum is 33.

The square root of 209034438 is about 14458.0233088759. The cubic root of 209034438 is about 593.4798073618.

The spelling of 209034438 in words is "two hundred nine million, thirty-four thousand, four hundred thirty-eight".