28265863 has 8 divisors (see below), whose sum is σ = 29877120. Its totient is φ = 26667000.

The previous prime is 28265843. The next prime is 28265879. The reversal of 28265863 is 36856282.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28265863 - 2⁹ = 28265351 is a prime.

It is a super-2 number, since 2×28265863² = 1597918022269538, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28265803) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1806 + ... + 7732.

It is an arithmetic number, because the mean of its divisors is an integer number (3734640).

Almost surely, 2^28265863 is an apocalyptic number.

28265863 is a deficient number, since it is larger than the sum of its proper divisors (1611257).

28265863 is a wasteful number, since it uses less digits than its factorization.

28265863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6197.

The product of its digits is 138240, while the sum is 40.

The square root of 28265863 is about 5316.5649624546. The cubic root of 28265863 is about 304.6169624993.

The spelling of 28265863 in words is "twenty-eight million, two hundred sixty-five thousand, eight hundred sixty-three".