243800540 has 24 divisors (see below), whose sum is σ = 523889520. Its totient is φ = 95251968.

The previous prime is 243800537. The next prime is 243800549. The reversal of 243800540 is 45008342.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243800549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 140885 + ... + 142604.

It is an arithmetic number, because the mean of its divisors is an integer number (21828730).

Almost surely, 2^243800540 is an apocalyptic number.

243800540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243800540 is an abundant number, since it is smaller than the sum of its proper divisors (280088980).

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

243800540 is a wasteful number, since it uses less digits than its factorization.

243800540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283541 (or 283539 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 243800540 is about 15614.1134874830. The cubic root of 243800540 is about 624.7096592778.

Adding to 243800540 its reverse (45008342), we get a palindrome (288808882).

The spelling of 243800540 in words is "two hundred forty-three million, eight hundred thousand, five hundred forty".