243922728 has 64 divisors (see below), whose sum is σ = 727234560. Its totient is φ = 66661056.

The previous prime is 243922727. The next prime is 243922733. The reversal of 243922728 is 827229342.

It is not an unprimeable number, because it can be changed into a prime (243922727) 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, 27700 + ... + 35427.

It is an arithmetic number, because the mean of its divisors is an integer number (11363040).

Almost surely, 2^243922728 is an apocalyptic number.

243922728 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

243922728 is an abundant number, since it is smaller than the sum of its proper divisors (483311832).

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

243922728 is a wasteful number, since it uses less digits than its factorization.

243922728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63166 (or 63162 counting only the distinct ones).

The product of its digits is 96768, while the sum is 39.

The square root of 243922728 is about 15618.0257395101. The cubic root of 243922728 is about 624.8140058821.

It can be divided in two parts, 243922 and 728, that added together give a triangular number (244650 = T₆₉₉).

The spelling of 243922728 in words is "two hundred forty-three million, nine hundred twenty-two thousand, seven hundred twenty-eight".