28579393 has 2 divisors, whose sum is σ = 28579394. Its totient is φ = 28579392.

The previous prime is 28579361. The next prime is 28579459. The reversal of 28579393 is 39397582.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21224449 + 7354944 = 4607^2 + 2712^2 .

It is a cyclic number.

It is not a de Polignac number, because 28579393 - 2⁵ = 28579361 is a prime.

It is not a weakly prime, because it can be changed into another prime (28579333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14289696 + 14289697.

It is an arithmetic number, because the mean of its divisors is an integer number (14289697).

Almost surely, 2^28579393 is an apocalyptic number.

It is an amenable number.

28579393 is a deficient number, since it is larger than the sum of its proper divisors (1).

28579393 is an equidigital number, since it uses as much as digits as its factorization.

28579393 is an evil number, because the sum of its binary digits is even.

The product of its digits is 408240, while the sum is 46.

The square root of 28579393 is about 5345.9697904122. The cubic root of 28579393 is about 305.7391122234.

The spelling of 28579393 in words is "twenty-eight million, five hundred seventy-nine thousand, three hundred ninety-three".