28536023 has 4 divisors (see below), whose sum is σ = 28626360. Its totient is φ = 28445688.

The previous prime is 28536019. The next prime is 28536049. The reversal of 28536023 is 32063582.

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

It is a cyclic number.

It is not a de Polignac number, because 28536023 - 2² = 28536019 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 (28536073) 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, 44693 + ... + 45326.

It is an arithmetic number, because the mean of its divisors is an integer number (7156590).

Almost surely, 2^28536023 is an apocalyptic number.

28536023 is a deficient number, since it is larger than the sum of its proper divisors (90337).

28536023 is an equidigital number, since it uses as much as digits as its factorization.

28536023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90336.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 28536023 is about 5341.9119236468. The cubic root of 28536023 is about 305.5843781419.

The spelling of 28536023 in words is "twenty-eight million, five hundred thirty-six thousand, twenty-three".