238647728 has 40 divisors (see below), whose sum is σ = 521819280. Its totient is φ = 104733440.

The previous prime is 238647727. The next prime is 238647767. The reversal of 238647728 is 827746832.

238647728 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (238647727) 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, 18275 + ... + 28482.

It is an arithmetic number, because the mean of its divisors is an integer number (13045482).

Almost surely, 2^238647728 is an apocalyptic number.

It is an amenable number.

238647728 is an abundant number, since it is smaller than the sum of its proper divisors (283171552).

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

238647728 is a wasteful number, since it uses less digits than its factorization.

238647728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46805 (or 46799 counting only the distinct ones).

The product of its digits is 903168, while the sum is 47.

The square root of 238647728 is about 15448.2273416726. The cubic root of 238647728 is about 620.2771289714.

The spelling of 238647728 in words is "two hundred thirty-eight million, six hundred forty-seven thousand, seven hundred twenty-eight".