28265123 has 4 divisors (see below), whose sum is σ = 28298088. Its totient is φ = 28232160.

The previous prime is 28265093. The next prime is 28265177. The reversal of 28265123 is 32156282.

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 28265123 - 2¹² = 28261027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28265023) 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, 15161 + ... + 16922.

It is an arithmetic number, because the mean of its divisors is an integer number (7074522).

Almost surely, 2^28265123 is an apocalyptic number.

28265123 is a deficient number, since it is larger than the sum of its proper divisors (32965).

28265123 is an equidigital number, since it uses as much as digits as its factorization.

28265123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32964.

The product of its digits is 5760, while the sum is 29.

The square root of 28265123 is about 5316.4953681913. The cubic root of 28265123 is about 304.6143041864.

The spelling of 28265123 in words is "twenty-eight million, two hundred sixty-five thousand, one hundred twenty-three".