28348897 has 2 divisors, whose sum is σ = 28348898. Its totient is φ = 28348896.

The previous prime is 28348883. The next prime is 28348909. The reversal of 28348897 is 79884382.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20106256 + 8242641 = 4484^2 + 2871^2 .

It is a cyclic number.

It is not a de Polignac number, because 28348897 - 2⁷ = 28348769 is a prime.

It is a super-2 number, since 2×28348897² = 1607319922233218, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28348897.

It is not a weakly prime, because it can be changed into another prime (28348807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14174448 + 14174449.

It is an arithmetic number, because the mean of its divisors is an integer number (14174449).

Almost surely, 2^28348897 is an apocalyptic number.

It is an amenable number.

28348897 is a deficient number, since it is larger than the sum of its proper divisors (1).

28348897 is an equidigital number, since it uses as much as digits as its factorization.

28348897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 774144, while the sum is 49.

The square root of 28348897 is about 5324.3682254329. The cubic root of 28348897 is about 304.9149525481.

The spelling of 28348897 in words is "twenty-eight million, three hundred forty-eight thousand, eight hundred ninety-seven".