28533867 has 4 divisors (see below), whose sum is σ = 38045160. Its totient is φ = 19022576.

The previous prime is 28533859. The next prime is 28533881. The reversal of 28533867 is 76833582.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28533867 - 2³ = 28533859 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28533367) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4755642 + ... + 4755647.

It is an arithmetic number, because the mean of its divisors is an integer number (9511290).

Almost surely, 2^28533867 is an apocalyptic number.

28533867 is a deficient number, since it is larger than the sum of its proper divisors (9511293).

28533867 is an equidigital number, since it uses as much as digits as its factorization.

28533867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9511292.

The product of its digits is 241920, while the sum is 42.

The square root of 28533867 is about 5341.7101194280. The cubic root of 28533867 is about 305.5766819455.

The spelling of 28533867 in words is "twenty-eight million, five hundred thirty-three thousand, eight hundred sixty-seven".