728655 has 16 divisors (see below), whose sum is σ = 1204224. Its totient is φ = 375840.

The previous prime is 728647. The next prime is 728659. The reversal of 728655 is 556827.

It is a happy number.

It is not a de Polignac number, because 728655 - 2³ = 728647 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728659) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 319 + ... + 1248.

It is an arithmetic number, because the mean of its divisors is an integer number (75264).

2⁷²⁸⁶⁵⁵ is an apocalyptic number.

728655 is a deficient number, since it is larger than the sum of its proper divisors (475569).

728655 is a wasteful number, since it uses less digits than its factorization.

728655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1606.

The product of its digits is 16800, while the sum is 33.

The square root of 728655 is about 853.6129099305. The cubic root of 728655 is about 89.9858002289.

The spelling of 728655 in words is "seven hundred twenty-eight thousand, six hundred fifty-five".