28248751 has 2 divisors, whose sum is σ = 28248752. Its totient is φ = 28248750.

The previous prime is 28248743. The next prime is 28248793. The reversal of 28248751 is 15784282.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28248751 - 2³ = 28248743 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28248751.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28248251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14124375 + 14124376.

It is an arithmetic number, because the mean of its divisors is an integer number (14124376).

Almost surely, 2^28248751 is an apocalyptic number.

28248751 is a deficient number, since it is larger than the sum of its proper divisors (1).

28248751 is an equidigital number, since it uses as much as digits as its factorization.

28248751 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 35840, while the sum is 37.

The square root of 28248751 is about 5314.9554090321. The cubic root of 28248751 is about 304.5554789385. Note that the first 3 decimals are identical.

The spelling of 28248751 in words is "twenty-eight million, two hundred forty-eight thousand, seven hundred fifty-one".