728703 has 16 divisors (see below), whose sum is σ = 1092960. Its totient is φ = 479808.

The previous prime is 728701. The next prime is 728713. The reversal of 728703 is 307827.

It is not a de Polignac number, because 728703 - 2¹ = 728701 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

728703 is a lucky number.

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 728703.

It is not an unprimeable number, because it can be changed into a prime (728701) 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, 3601 + ... + 3797.

It is an arithmetic number, because the mean of its divisors is an integer number (68310).

2⁷²⁸⁷⁰³ is an apocalyptic number.

728703 is a deficient number, since it is larger than the sum of its proper divisors (364257).

728703 is a wasteful number, since it uses less digits than its factorization.

728703 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343 (or 337 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 27.

The square root of 728703 is about 853.6410252559. The cubic root of 728703 is about 89.9877761176.

It can be divided in two parts, 728 and 703, that added together give a triangular number (1431 = T₅₃).

The spelling of 728703 in words is "seven hundred twenty-eight thousand, seven hundred three".