28641751 has 2 divisors, whose sum is σ = 28641752. Its totient is φ = 28641750.

The previous prime is 28641733. The next prime is 28641793. The reversal of 28641751 is 15714682.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28641751 - 2¹¹ = 28639703 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28641731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14320875 + 14320876.

It is an arithmetic number, because the mean of its divisors is an integer number (14320876).

Almost surely, 2^28641751 is an apocalyptic number.

28641751 is a deficient number, since it is larger than the sum of its proper divisors (1).

28641751 is an equidigital number, since it uses as much as digits as its factorization.

28641751 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13440, while the sum is 34.

The square root of 28641751 is about 5351.7988564594. The cubic root of 28641751 is about 305.9613169664.

It can be divided in two parts, 28641 and 751, that added together give a palindrome (29392).

The spelling of 28641751 in words is "twenty-eight million, six hundred forty-one thousand, seven hundred fifty-one".