28374817 has 2 divisors, whose sum is σ = 28374818. Its totient is φ = 28374816.

The previous prime is 28374791. The next prime is 28374851. The reversal of 28374817 is 71847382.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25969216 + 2405601 = 5096^2 + 1551^2 .

It is a cyclic number.

It is not a de Polignac number, because 28374817 - 2¹¹ = 28372769 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28374817.

It is not a weakly prime, because it can be changed into another prime (28374217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14187408 + 14187409.

It is an arithmetic number, because the mean of its divisors is an integer number (14187409).

Almost surely, 2^28374817 is an apocalyptic number.

It is an amenable number.

28374817 is a deficient number, since it is larger than the sum of its proper divisors (1).

28374817 is an equidigital number, since it uses as much as digits as its factorization.

28374817 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 75264, while the sum is 40.

The square root of 28374817 is about 5326.8017609068. The cubic root of 28374817 is about 305.0078543171.

The spelling of 28374817 in words is "twenty-eight million, three hundred seventy-four thousand, eight hundred seventeen".