28266847 has 4 divisors (see below), whose sum is σ = 32304976. Its totient is φ = 24228720.

The previous prime is 28266829. The next prime is 28266857. The reversal of 28266847 is 74866282.

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 28266847 - 2¹⁵ = 28234079 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 (28266817) 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, 2019054 + ... + 2019067.

It is an arithmetic number, because the mean of its divisors is an integer number (8076244).

Almost surely, 2^28266847 is an apocalyptic number.

28266847 is a deficient number, since it is larger than the sum of its proper divisors (4038129).

28266847 is an equidigital number, since it uses as much as digits as its factorization.

28266847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4038128.

The product of its digits is 258048, while the sum is 43.

The square root of 28266847 is about 5316.6575026044. The cubic root of 28266847 is about 304.6204972650.

The spelling of 28266847 in words is "twenty-eight million, two hundred sixty-six thousand, eight hundred forty-seven".