28726147 has 2 divisors, whose sum is σ = 28726148. Its totient is φ = 28726146.

The previous prime is 28726129. The next prime is 28726151. The reversal of 28726147 is 74162782.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28726147 - 2²³ = 20337539 is a prime.

It is not a weakly prime, because it can be changed into another prime (28726177) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14363073 + 14363074.

It is an arithmetic number, because the mean of its divisors is an integer number (14363074).

Almost surely, 2^28726147 is an apocalyptic number.

28726147 is a deficient number, since it is larger than the sum of its proper divisors (1).

28726147 is an equidigital number, since it uses as much as digits as its factorization.

28726147 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 37632, while the sum is 37.

The square root of 28726147 is about 5359.6778821119. The cubic root of 28726147 is about 306.2615382575.

The spelling of 28726147 in words is "twenty-eight million, seven hundred twenty-six thousand, one hundred forty-seven".