728355 has 16 divisors (see below), whose sum is σ = 1186560. Its totient is φ = 381408.

The previous prime is 728333. The next prime is 728369. The reversal of 728355 is 553827.

It is a happy number.

728355 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 728355 - 2⁹ = 727843 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 474 + ... + 1296.

It is an arithmetic number, because the mean of its divisors is an integer number (74160).

2⁷²⁸³⁵⁵ is an apocalyptic number.

728355 is a deficient number, since it is larger than the sum of its proper divisors (458205).

728355 is a wasteful number, since it uses less digits than its factorization.

728355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 890.

The product of its digits is 8400, while the sum is 30.

The square root of 728355 is about 853.4371681618. The cubic root of 728355 is about 89.9734489580.

The spelling of 728355 in words is "seven hundred twenty-eight thousand, three hundred fifty-five".