28543005 has 24 divisors (see below), whose sum is σ = 50218272. Its totient is φ = 14994144.

The previous prime is 28543001. The next prime is 28543019. The reversal of 28543005 is 50034582.

It is not a de Polignac number, because 28543005 - 2² = 28543001 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28543005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28543001) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1719 + ... + 7748.

It is an arithmetic number, because the mean of its divisors is an integer number (2092428).

Almost surely, 2^28543005 is an apocalyptic number.

It is an amenable number.

28543005 is a deficient number, since it is larger than the sum of its proper divisors (21675267).

28543005 is a wasteful number, since it uses less digits than its factorization.

28543005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9545 (or 9542 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 28543005 is about 5342.5653950139. The cubic root of 28543005 is about 305.6092988785.

Adding to 28543005 its reverse (50034582), we get a palindrome (78577587).

The spelling of 28543005 in words is "twenty-eight million, five hundred forty-three thousand, five".