728567 has 16 divisors (see below), whose sum is σ = 893760. Its totient is φ = 580608.

The previous prime is 728561. The next prime is 728573. The reversal of 728567 is 765827.

It is an interprime number because it is at equal distance from previous prime (728561) and next prime (728573).

It is not a de Polignac number, because 728567 - 2⁴ = 728551 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728561) 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, 7463 + ... + 7559.

It is an arithmetic number, because the mean of its divisors is an integer number (55860).

2⁷²⁸⁵⁶⁷ is an apocalyptic number.

728567 is a deficient number, since it is larger than the sum of its proper divisors (165193).

728567 is a wasteful number, since it uses less digits than its factorization.

728567 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170.

The product of its digits is 23520, while the sum is 35.

The square root of 728567 is about 853.5613627619. The cubic root of 728567 is about 89.9821775409.

The spelling of 728567 in words is "seven hundred twenty-eight thousand, five hundred sixty-seven".