28279357 has 2 divisors, whose sum is σ = 28279358. Its totient is φ = 28279356.

The previous prime is 28279333. The next prime is 28279373. The reversal of 28279357 is 75397282.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27941796 + 337561 = 5286^2 + 581^2 .

It is a cyclic number.

It is not a de Polignac number, because 28279357 - 2¹¹ = 28277309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28279387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14139678 + 14139679.

It is an arithmetic number, because the mean of its divisors is an integer number (14139679).

Almost surely, 2^28279357 is an apocalyptic number.

It is an amenable number.

28279357 is a deficient number, since it is larger than the sum of its proper divisors (1).

28279357 is an equidigital number, since it uses as much as digits as its factorization.

28279357 is an evil number, because the sum of its binary digits is even.

The product of its digits is 211680, while the sum is 43.

The square root of 28279357 is about 5317.8338635200. The cubic root of 28279357 is about 304.6654290583.

The spelling of 28279357 in words is "twenty-eight million, two hundred seventy-nine thousand, three hundred fifty-seven".