27428867 has 4 divisors (see below), whose sum is σ = 28374720. Its totient is φ = 26483016.

The previous prime is 27428861. The next prime is 27428881. The reversal of 27428867 is 76882472.

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 27428867 - 2²⁴ = 10651651 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27428861) 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, 472883 + ... + 472940.

It is an arithmetic number, because the mean of its divisors is an integer number (7093680).

Almost surely, 2^27428867 is an apocalyptic number.

27428867 is a deficient number, since it is larger than the sum of its proper divisors (945853).

27428867 is an equidigital number, since it uses as much as digits as its factorization.

27428867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 945852.

The product of its digits is 301056, while the sum is 44.

The square root of 27428867 is about 5237.2575838887. The cubic root of 27428867 is about 301.5800597236.

The spelling of 27428867 in words is "twenty-seven million, four hundred twenty-eight thousand, eight hundred sixty-seven".