28252397 has 2 divisors, whose sum is σ = 28252398. Its totient is φ = 28252396.

The previous prime is 28252381. The next prime is 28252447. The reversal of 28252397 is 79325282.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20124196 + 8128201 = 4486^2 + 2851^2 .

It is a cyclic number.

It is not a de Polignac number, because 28252397 - 2⁴ = 28252381 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28252397.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28242397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14126198 + 14126199.

It is an arithmetic number, because the mean of its divisors is an integer number (14126199).

Almost surely, 2^28252397 is an apocalyptic number.

It is an amenable number.

28252397 is a deficient number, since it is larger than the sum of its proper divisors (1).

28252397 is an equidigital number, since it uses as much as digits as its factorization.

28252397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 60480, while the sum is 38.

The square root of 28252397 is about 5315.2983923765. The cubic root of 28252397 is about 304.5685811285.

The spelling of 28252397 in words is "twenty-eight million, two hundred fifty-two thousand, three hundred ninety-seven".