243040800 has 72 divisors (see below), whose sum is σ = 791105616. Its totient is φ = 64810240.

The previous prime is 243040781. The next prime is 243040801. The reversal of 243040800 is 8040342.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (243040801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 48234 + ... + 53033.

It is an arithmetic number, because the mean of its divisors is an integer number (10987578).

Almost surely, 2^243040800 is an apocalyptic number.

243040800 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243040800 is an abundant number, since it is smaller than the sum of its proper divisors (548064816).

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

243040800 is a wasteful number, since it uses less digits than its factorization.

243040800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101290 (or 101277 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 243040800 is about 15589.7658738032. The cubic root of 243040800 is about 624.0600698253.

The spelling of 243040800 in words is "two hundred forty-three million, forty thousand, eight hundred".