28000863 has 32 divisors (see below), whose sum is σ = 46828800. Its totient is φ = 16380000.

The previous prime is 28000849. The next prime is 28000877. The reversal of 28000863 is 36800082.

It is an interprime number because it is at equal distance from previous prime (28000849) and next prime (28000877).

It is not a de Polignac number, because 28000863 - 2⁵ = 28000831 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28000163) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6988 + ... + 10238.

It is an arithmetic number, because the mean of its divisors is an integer number (1463400).

Almost surely, 2^28000863 is an apocalyptic number.

28000863 is a deficient number, since it is larger than the sum of its proper divisors (18827937).

28000863 is a wasteful number, since it uses less digits than its factorization.

28000863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3300 (or 3294 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 28000863 is about 5291.5841673359. The cubic root of 28000863 is about 303.6620168892.

The spelling of 28000863 in words is "twenty-eight million, eight hundred sixty-three", and thus it is an aban number.