243400326 has 32 divisors (see below), whose sum is σ = 528396288. Its totient is φ = 74299680.

The previous prime is 243400321. The next prime is 243400349. The reversal of 243400326 is 623004342.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 243400296 and 243400305.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243400321) 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, 2380 + ... + 22191.

It is an arithmetic number, because the mean of its divisors is an integer number (16512384).

Almost surely, 2^243400326 is an apocalyptic number.

243400326 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

243400326 is an abundant number, since it is smaller than the sum of its proper divisors (284995962).

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

243400326 is a wasteful number, since it uses less digits than its factorization.

243400326 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24716.

The product of its (nonzero) digits is 3456, while the sum is 24.

The square root of 243400326 is about 15601.2924464610. The cubic root of 243400326 is about 624.3676385929.

Adding to 243400326 its reverse (623004342), we get a palindrome (866404668).

The spelling of 243400326 in words is "two hundred forty-three million, four hundred thousand, three hundred twenty-six".