347728 has 20 divisors (see below), whose sum is σ = 683488. Its totient is φ = 171360.

The previous prime is 347717. The next prime is 347729. The reversal of 347728 is 827743.

It is a self number, because there is not a number n which added to its sum of digits gives 347728.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 347728.

It is not an unprimeable number, because it can be changed into a prime (347729) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1543 + ... + 1753.

2³⁴⁷⁷²⁸ is an apocalyptic number.

It is an amenable number.

347728 is a deficient number, since it is larger than the sum of its proper divisors (335760).

347728 is a wasteful number, since it uses less digits than its factorization.

347728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 322 (or 316 counting only the distinct ones).

The product of its digits is 9408, while the sum is 31.

The square root of 347728 is about 589.6846614929. The cubic root of 347728 is about 70.3201660448.

The spelling of 347728 in words is "three hundred forty-seven thousand, seven hundred twenty-eight".