243039728 has 10 divisors (see below), whose sum is σ = 470889504. Its totient is φ = 121519856.

The previous prime is 243039673. The next prime is 243039733. The reversal of 243039728 is 827930342.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 243039691 and 243039700.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7594976 + ... + 7595007.

Almost surely, 2^243039728 is an apocalyptic number.

It is an amenable number.

243039728 is a deficient number, since it is larger than the sum of its proper divisors (227849776).

243039728 is a wasteful number, since it uses less digits than its factorization.

243039728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15189991 (or 15189985 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 38.

The square root of 243039728 is about 15589.7314922355. The cubic root of 243039728 is about 624.0591522930.

The spelling of 243039728 in words is "two hundred forty-three million, thirty-nine thousand, seven hundred twenty-eight".