243400530 has 32 divisors (see below), whose sum is σ = 603007488. Its totient is φ = 62812800.

The previous prime is 243400529. The next prime is 243400579. The reversal of 243400530 is 35004342.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 243400497 and 243400506.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 129931 + ... + 131790.

It is an arithmetic number, because the mean of its divisors is an integer number (18843984).

Almost surely, 2^243400530 is an apocalyptic number.

243400530 is an abundant number, since it is smaller than the sum of its proper divisors (359606958).

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

243400530 is a wasteful number, since it uses less digits than its factorization.

243400530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261762.

The product of its (nonzero) digits is 1440, while the sum is 21.

The square root of 243400530 is about 15601.2989843795. The cubic root of 243400530 is about 624.3678130257.

Adding to 243400530 its reverse (35004342), we get a palindrome (278404872).

The spelling of 243400530 in words is "two hundred forty-three million, four hundred thousand, five hundred thirty".