340728 has 16 divisors (see below), whose sum is σ = 851880. Its totient is φ = 113568.

The previous prime is 340723. The next prime is 340757. The reversal of 340728 is 827043.

It is a Harshad number since it is a multiple of its sum of digits (24), and also a Moran number because the ratio is a prime number: 14197 = 340728 / (3 + 4 + 0 + 7 + 2 + 8).

It is a junction number, because it is equal to n+sod(n) for n = 340698 and 340707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (340723) 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, 7075 + ... + 7122.

2³⁴⁰⁷²⁸ is an apocalyptic number.

It is an amenable number.

340728 is an abundant number, since it is smaller than the sum of its proper divisors (511152).

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

340728 is a wasteful number, since it uses less digits than its factorization.

340728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14206 (or 14202 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 24.

The square root of 340728 is about 583.7191105318. The cubic root of 340728 is about 69.8450996566.

The spelling of 340728 in words is "three hundred forty thousand, seven hundred twenty-eight".