28267863 has 16 divisors (see below), whose sum is σ = 41149920. Its totient is φ = 17155584.

The previous prime is 28267861. The next prime is 28267867. The reversal of 28267863 is 36876282.

It is not a de Polignac number, because 28267863 - 2¹ = 28267861 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28267861) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2118 + ... + 7811.

It is an arithmetic number, because the mean of its divisors is an integer number (2571870).

Almost surely, 2^28267863 is an apocalyptic number.

28267863 is a deficient number, since it is larger than the sum of its proper divisors (12882057).

28267863 is a wasteful number, since it uses less digits than its factorization.

28267863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10018.

The product of its digits is 193536, while the sum is 42.

The square root of 28267863 is about 5316.7530504999. The cubic root of 28267863 is about 304.6241468964.

The spelling of 28267863 in words is "twenty-eight million, two hundred sixty-seven thousand, eight hundred sixty-three".