28374293 has 2 divisors, whose sum is σ = 28374294. Its totient is φ = 28374292.

The previous prime is 28374289. The next prime is 28374317. The reversal of 28374293 is 39247382.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17497489 + 10876804 = 4183^2 + 3298^2 .

It is a cyclic number.

It is not a de Polignac number, because 28374293 - 2² = 28374289 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28374263) 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, 14187146 + 14187147.

It is an arithmetic number, because the mean of its divisors is an integer number (14187147).

Almost surely, 2^28374293 is an apocalyptic number.

It is an amenable number.

28374293 is a deficient number, since it is larger than the sum of its proper divisors (1).

28374293 is an equidigital number, since it uses as much as digits as its factorization.

28374293 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72576, while the sum is 38.

The square root of 28374293 is about 5326.7525754441. The cubic root of 28374293 is about 305.0059767708.

The spelling of 28374293 in words is "twenty-eight million, three hundred seventy-four thousand, two hundred ninety-three".