28543393 has 2 divisors, whose sum is σ = 28543394. Its totient is φ = 28543392.

The previous prime is 28543387. The next prime is 28543399. The reversal of 28543393 is 39334582.

It is a balanced prime because it is at equal distance from previous prime (28543387) and next prime (28543399).

It can be written as a sum of positive squares in only one way, i.e., 28376929 + 166464 = 5327^2 + 408^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28543393 is a prime.

It is not a weakly prime, because it can be changed into another prime (28543399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14271696 + 14271697.

It is an arithmetic number, because the mean of its divisors is an integer number (14271697).

Almost surely, 2^28543393 is an apocalyptic number.

It is an amenable number.

28543393 is a deficient number, since it is larger than the sum of its proper divisors (1).

28543393 is an equidigital number, since it uses as much as digits as its factorization.

28543393 is an evil number, because the sum of its binary digits is even.

The product of its digits is 77760, while the sum is 37.

The square root of 28543393 is about 5342.6017070338. The cubic root of 28543393 is about 305.6106836412.

The spelling of 28543393 in words is "twenty-eight million, five hundred forty-three thousand, three hundred ninety-three".