209304042 has 16 divisors (see below), whose sum is σ = 429922272. Its totient is φ = 67882320.

The previous prime is 209304041. The next prime is 209304083. The reversal of 209304042 is 240403902.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (209304041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 471184 + ... + 471627.

It is an arithmetic number, because the mean of its divisors is an integer number (26870142).

Almost surely, 2^209304042 is an apocalyptic number.

209304042 is an abundant number, since it is smaller than the sum of its proper divisors (220618230).

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

209304042 is a wasteful number, since it uses less digits than its factorization.

209304042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 942853.

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 209304042 is about 14467.3439856803. The cubic root of 209304042 is about 593.7348463427.

Adding to 209304042 its reverse (240403902), we get a palindrome (449707944).

The spelling of 209304042 in words is "two hundred nine million, three hundred four thousand, forty-two".