28260023 has 4 divisors (see below), whose sum is σ = 30829128. Its totient is φ = 25690920.

The previous prime is 28260017. The next prime is 28260041. The reversal of 28260023 is 32006282.

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 28260023 - 2¹⁰ = 28258999 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28260053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1284536 + ... + 1284557.

It is an arithmetic number, because the mean of its divisors is an integer number (7707282).

Almost surely, 2^28260023 is an apocalyptic number.

28260023 is a deficient number, since it is larger than the sum of its proper divisors (2569105).

28260023 is a wasteful number, since it uses less digits than its factorization.

28260023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2569104.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 28260023 is about 5316.0157072755. The cubic root of 28260023 is about 304.5959821198.

The spelling of 28260023 in words is "twenty-eight million, two hundred sixty thousand, twenty-three".