28527397 has 2 divisors, whose sum is σ = 28527398. Its totient is φ = 28527396.

The previous prime is 28527319. The next prime is 28527403. The reversal of 28527397 is 79372582.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25090081 + 3437316 = 5009^2 + 1854^2 .

It is a cyclic number.

It is not a de Polignac number, because 28527397 - 2¹¹ = 28525349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28527307) 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, 14263698 + 14263699.

It is an arithmetic number, because the mean of its divisors is an integer number (14263699).

Almost surely, 2^28527397 is an apocalyptic number.

It is an amenable number.

28527397 is a deficient number, since it is larger than the sum of its proper divisors (1).

28527397 is an equidigital number, since it uses as much as digits as its factorization.

28527397 is an odious number, because the sum of its binary digits is odd.

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

The square root of 28527397 is about 5341.1044737957. The cubic root of 28527397 is about 305.5535838893.

The spelling of 28527397 in words is "twenty-eight million, five hundred twenty-seven thousand, three hundred ninety-seven".