28248361 has 2 divisors, whose sum is σ = 28248362. Its totient is φ = 28248360.

The previous prime is 28248359. The next prime is 28248379. The reversal of 28248361 is 16384282.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26163225 + 2085136 = 5115^2 + 1444^2 .

It is a cyclic number.

It is not a de Polignac number, because 28248361 - 2¹ = 28248359 is a prime.

Together with 28248359, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (28248461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14124180 + 14124181.

It is an arithmetic number, because the mean of its divisors is an integer number (14124181).

Almost surely, 2^28248361 is an apocalyptic number.

It is an amenable number.

28248361 is a deficient number, since it is larger than the sum of its proper divisors (1).

28248361 is an equidigital number, since it uses as much as digits as its factorization.

28248361 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18432, while the sum is 34.

The square root of 28248361 is about 5314.9187199806. The cubic root of 28248361 is about 304.5540773759.

The spelling of 28248361 in words is "twenty-eight million, two hundred forty-eight thousand, three hundred sixty-one".