867728 has 20 divisors (see below), whose sum is σ = 1695948. Its totient is φ = 430080.

The previous prime is 867719. The next prime is 867733. The reversal of 867728 is 827768.

867728 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 394384 + 473344 = 628^2 + 688^2 .

It is a junction number, because it is equal to n+sod(n) for n = 867691 and 867700.

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 867728.

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, 2948 + ... + 3228.

2⁸⁶⁷⁷²⁸ is an apocalyptic number.

It is an amenable number.

867728 is a deficient number, since it is larger than the sum of its proper divisors (828220).

867728 is a wasteful number, since it uses less digits than its factorization.

867728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 482 (or 476 counting only the distinct ones).

The product of its digits is 37632, while the sum is 38.

The square root of 867728 is about 931.5191892817. The cubic root of 867728 is about 95.3808533963.

The spelling of 867728 in words is "eight hundred sixty-seven thousand, seven hundred twenty-eight".