28240301 has 2 divisors, whose sum is σ = 28240302. Its totient is φ = 28240300.

The previous prime is 28240273. The next prime is 28240309. The reversal of 28240301 is 10304282.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26020201 + 2220100 = 5101^2 + 1490^2 .

It is a cyclic number.

It is not a de Polignac number, because 28240301 - 2⁶ = 28240237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28240309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14120150 + 14120151.

It is an arithmetic number, because the mean of its divisors is an integer number (14120151).

Almost surely, 2^28240301 is an apocalyptic number.

It is an amenable number.

28240301 is a deficient number, since it is larger than the sum of its proper divisors (1).

28240301 is an equidigital number, since it uses as much as digits as its factorization.

28240301 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 28240301 is about 5314.1604228702. The cubic root of 28240301 is about 304.5251088590.

Adding to 28240301 its reverse (10304282), we get a palindrome (38544583).

The spelling of 28240301 in words is "twenty-eight million, two hundred forty thousand, three hundred one".