8728567 has 4 divisors (see below), whose sum is σ = 8750736. Its totient is φ = 8706400.

The previous prime is 8728549. The next prime is 8728571. The reversal of 8728567 is 7658278.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7658278 = 2 ⋅3829139.

It is a cyclic number.

It is not a de Polignac number, because 8728567 - 2²³ = 339959 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8728597) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10483 + ... + 11284.

It is an arithmetic number, because the mean of its divisors is an integer number (2187684).

Almost surely, 2^8728567 is an apocalyptic number.

8728567 is a deficient number, since it is larger than the sum of its proper divisors (22169).

8728567 is a wasteful number, since it uses less digits than its factorization.

8728567 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22168.

The product of its digits is 188160, while the sum is 43.

The square root of 8728567 is about 2954.4148320776. The cubic root of 8728567 is about 205.8958769363.

The spelling of 8728567 in words is "eight million, seven hundred twenty-eight thousand, five hundred sixty-seven".