28544623 has 4 divisors (see below), whose sum is σ = 28750120. Its totient is φ = 28339128.

The previous prime is 28544617. The next prime is 28544629. The reversal of 28544623 is 32644582.

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

It is an interprime number because it is at equal distance from previous prime (28544617) and next prime (28544629).

It is a cyclic number.

It is not a de Polignac number, because 28544623 - 2⁹ = 28544111 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 (28544629) 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, 102540 + ... + 102817.

It is an arithmetic number, because the mean of its divisors is an integer number (7187530).

Almost surely, 2^28544623 is an apocalyptic number.

28544623 is a deficient number, since it is larger than the sum of its proper divisors (205497).

28544623 is a wasteful number, since it uses less digits than its factorization.

28544623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205496.

The product of its digits is 46080, while the sum is 34.

The square root of 28544623 is about 5342.7168182489. The cubic root of 28544623 is about 305.6150733990.

The spelling of 28544623 in words is "twenty-eight million, five hundred forty-four thousand, six hundred twenty-three".