28028347 has 2 divisors, whose sum is σ = 28028348. Its totient is φ = 28028346.

The previous prime is 28028327. The next prime is 28028381. The reversal of 28028347 is 74382082.

It is an a-pointer prime, because the next prime (28028381) can be obtained adding 28028347 to its sum of digits (34).

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28028347 is a prime.

It is not a weakly prime, because it can be changed into another prime (28028317) 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 as a sum of consecutive naturals, namely, 14014173 + 14014174.

It is an arithmetic number, because the mean of its divisors is an integer number (14014174).

Almost surely, 2^28028347 is an apocalyptic number.

28028347 is a deficient number, since it is larger than the sum of its proper divisors (1).

28028347 is an equidigital number, since it uses as much as digits as its factorization.

28028347 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21504, while the sum is 34.

The square root of 28028347 is about 5294.1804842676. The cubic root of 28028347 is about 303.7613366585.

The spelling of 28028347 in words is "twenty-eight million, twenty-eight thousand, three hundred forty-seven".