28032751 has 2 divisors, whose sum is σ = 28032752. Its totient is φ = 28032750.

The previous prime is 28032713. The next prime is 28032757. The reversal of 28032751 is 15723082.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28032751 - 2⁷ = 28032623 is a prime.

It is a plaindrome in base 16.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28032757) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14016375 + 14016376.

It is an arithmetic number, because the mean of its divisors is an integer number (14016376).

Almost surely, 2^28032751 is an apocalyptic number.

28032751 is a deficient number, since it is larger than the sum of its proper divisors (1).

28032751 is an equidigital number, since it uses as much as digits as its factorization.

28032751 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 28032751 is about 5294.5963963271. The cubic root of 28032751 is about 303.7772454914. Note that the first 3 decimals are identical.

The spelling of 28032751 in words is "twenty-eight million, thirty-two thousand, seven hundred fifty-one".