243233174772728 has 32 divisors (see below), whose sum is σ = 539186840632800. Its totient is φ = 100648210250112.

The previous prime is 243233174772727. The next prime is 243233174772799. The reversal of 243233174772728 is 827277471332342.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243233174772727) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74887059575 + ... + 74887062822.

It is an arithmetic number, because the mean of its divisors is an integer number (16849588769775).

Almost surely, 2^{243233174772728} is an apocalyptic number.

243233174772728 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

243233174772728 is an abundant number, since it is smaller than the sum of its proper divisors (295953665860072).

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

243233174772728 is a wasteful number, since it uses less digits than its factorization.

243233174772728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149774122439 (or 149774122435 counting only the distinct ones).

The product of its digits is 132765696, while the sum is 62.

The spelling of 243233174772728 in words is "two hundred forty-three trillion, two hundred thirty-three billion, one hundred seventy-four million, seven hundred seventy-two thousand, seven hundred twenty-eight".