28587567 has 4 divisors (see below), whose sum is σ = 38116760. Its totient is φ = 19058376.

The previous prime is 28587563. The next prime is 28587577. The reversal of 28587567 is 76578582.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 28587567 - 2² = 28587563 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 (28587563) 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, 4764592 + ... + 4764597.

It is an arithmetic number, because the mean of its divisors is an integer number (9529190).

Almost surely, 2^28587567 is an apocalyptic number.

28587567 is a deficient number, since it is larger than the sum of its proper divisors (9529193).

28587567 is an equidigital number, since it uses as much as digits as its factorization.

28587567 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9529192.

The product of its digits is 940800, while the sum is 48.

The square root of 28587567 is about 5346.7342368964. The cubic root of 28587567 is about 305.7682576206.

The spelling of 28587567 in words is "twenty-eight million, five hundred eighty-seven thousand, five hundred sixty-seven".