717028 has 12 divisors (see below), whose sum is σ = 1351420. Its totient is φ = 330912.

The previous prime is 717011. The next prime is 717047. The reversal of 717028 is 820717.

It is a happy number.

717028 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 438244 + 278784 = 662^2 + 528^2 .

It is a junction number, because it is equal to n+sod(n) for n = 716993 and 717011.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6843 + ... + 6946.

2⁷¹⁷⁰²⁸ is an apocalyptic number.

It is an amenable number.

717028 is a deficient number, since it is larger than the sum of its proper divisors (634392).

717028 is a wasteful number, since it uses less digits than its factorization.

717028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13806 (or 13804 counting only the distinct ones).

The product of its (nonzero) digits is 784, while the sum is 25.

The square root of 717028 is about 846.7750586785. The cubic root of 717028 is about 89.5046032400.

Subtracting from 717028 its sum of digits (25), we obtain a triangular number (717003 = T₁₁₉₇).

The spelling of 717028 in words is "seven hundred seventeen thousand, twenty-eight".