28130267 has 4 divisors (see below), whose sum is σ = 30687576. Its totient is φ = 25572960.

The previous prime is 28130251. The next prime is 28130273. The reversal of 28130267 is 76203182.

It is a happy number.

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 28130267 - 2⁴ = 28130251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28130867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1278638 + ... + 1278659.

It is an arithmetic number, because the mean of its divisors is an integer number (7671894).

Almost surely, 2^28130267 is an apocalyptic number.

28130267 is a deficient number, since it is larger than the sum of its proper divisors (2557309).

28130267 is a wasteful number, since it uses less digits than its factorization.

28130267 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2557308.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 28130267 is about 5303.7974131748. The cubic root of 28130267 is about 304.1290822725.

The spelling of 28130267 in words is "twenty-eight million, one hundred thirty thousand, two hundred sixty-seven".