28317727 has 2 divisors, whose sum is σ = 28317728. Its totient is φ = 28317726.

The previous prime is 28317721. The next prime is 28317749. The reversal of 28317727 is 72771382.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28317727 - 2³ = 28317719 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28317721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14158863 + 14158864.

It is an arithmetic number, because the mean of its divisors is an integer number (14158864).

Almost surely, 2^28317727 is an apocalyptic number.

28317727 is a deficient number, since it is larger than the sum of its proper divisors (1).

28317727 is an equidigital number, since it uses as much as digits as its factorization.

28317727 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32928, while the sum is 37.

The square root of 28317727 is about 5321.4403125470. The cubic root of 28317727 is about 304.8031588449.

The spelling of 28317727 in words is "twenty-eight million, three hundred seventeen thousand, seven hundred twenty-seven".