728673 has 16 divisors (see below), whose sum is σ = 1078272. Its totient is φ = 434000.

The previous prime is 728659. The next prime is 728681. The reversal of 728673 is 376827.

728673 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 728673 - 2⁸ = 728417 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (728173) 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, 2188 + ... + 2498.

It is an arithmetic number, because the mean of its divisors is an integer number (67392).

2⁷²⁸⁶⁷³ is an apocalyptic number.

It is an amenable number.

728673 is a deficient number, since it is larger than the sum of its proper divisors (349599).

728673 is a wasteful number, since it uses less digits than its factorization.

728673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 396.

The product of its digits is 14112, while the sum is 33.

The square root of 728673 is about 853.6234532860. The cubic root of 728673 is about 89.9865411973.

It can be divided in two parts, 7 and 28673, that added together give a triangular number (28680 = T₂₃₉).

The spelling of 728673 in words is "seven hundred twenty-eight thousand, six hundred seventy-three".