28247863 has 12 divisors (see below), whose sum is σ = 34793712. Its totient is φ = 22787520.

The previous prime is 28247833. The next prime is 28247881. The reversal of 28247863 is 36874282.

It is not a de Polignac number, because 28247863 - 2⁵ = 28247831 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 (28247833) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16123 + ... + 17788.

It is an arithmetic number, because the mean of its divisors is an integer number (2899476).

Almost surely, 2^28247863 is an apocalyptic number.

28247863 is a deficient number, since it is larger than the sum of its proper divisors (6545849).

28247863 is a wasteful number, since it uses less digits than its factorization.

28247863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33942 (or 33935 counting only the distinct ones).

The product of its digits is 129024, while the sum is 40.

The square root of 28247863 is about 5314.8718705158. The cubic root of 28247863 is about 304.5522876694.

The spelling of 28247863 in words is "twenty-eight million, two hundred forty-seven thousand, eight hundred sixty-three".