28810863 has 8 divisors (see below), whose sum is σ = 42682800. Its totient is φ = 19207224.

The previous prime is 28810841. The next prime is 28810867. The reversal of 28810863 is 36801882.

It is not a de Polignac number, because 28810863 - 2⁶ = 28810799 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28810867) 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, 533508 + ... + 533561.

It is an arithmetic number, because the mean of its divisors is an integer number (5335350).

Almost surely, 2^28810863 is an apocalyptic number.

28810863 is a deficient number, since it is larger than the sum of its proper divisors (13871937).

28810863 is a wasteful number, since it uses less digits than its factorization.

28810863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1067078 (or 1067072 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 28810863 is about 5367.5751508479. The cubic root of 28810863 is about 306.5623070915.

The spelling of 28810863 in words is "twenty-eight million, eight hundred ten thousand, eight hundred sixty-three".