28390267 has 2 divisors, whose sum is σ = 28390268. Its totient is φ = 28390266.

The previous prime is 28390259. The next prime is 28390283. The reversal of 28390267 is 76209382.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28390267 - 2³ = 28390259 is a prime.

It is not a weakly prime, because it can be changed into another prime (28390207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14195133 + 14195134.

It is an arithmetic number, because the mean of its divisors is an integer number (14195134).

Almost surely, 2^28390267 is an apocalyptic number.

28390267 is a deficient number, since it is larger than the sum of its proper divisors (1).

28390267 is an equidigital number, since it uses as much as digits as its factorization.

28390267 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 28390267 is about 5328.2517770841. The cubic root of 28390267 is about 305.0632028834.

The spelling of 28390267 in words is "twenty-eight million, three hundred ninety thousand, two hundred sixty-seven".