209350434 has 16 divisors (see below), whose sum is σ = 420441120. Its totient is φ = 69493440.

The previous prime is 209350433. The next prime is 209350489. The reversal of 209350434 is 434053902.

It is not an unprimeable number, because it can be changed into a prime (209350433) 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, 70944 + ... + 73835.

It is an arithmetic number, because the mean of its divisors is an integer number (26277570).

Almost surely, 2^209350434 is an apocalyptic number.

209350434 is an abundant number, since it is smaller than the sum of its proper divisors (211090686).

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

209350434 is a wasteful number, since it uses less digits than its factorization.

209350434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145025.

The product of its (nonzero) digits is 12960, while the sum is 30.

The square root of 209350434 is about 14468.9472319170. The cubic root of 209350434 is about 593.7787099839.

The spelling of 209350434 in words is "two hundred nine million, three hundred fifty thousand, four hundred thirty-four".