28885141 has 2 divisors, whose sum is σ = 28885142. Its totient is φ = 28885140.

The previous prime is 28885133. The next prime is 28885163. The reversal of 28885141 is 14158882.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16982641 + 11902500 = 4121^2 + 3450^2 .

It is a cyclic number.

It is not a de Polignac number, because 28885141 - 2³ = 28885133 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28885141.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28885541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14442570 + 14442571.

It is an arithmetic number, because the mean of its divisors is an integer number (14442571).

Almost surely, 2^28885141 is an apocalyptic number.

It is an amenable number.

28885141 is a deficient number, since it is larger than the sum of its proper divisors (1).

28885141 is an equidigital number, since it uses as much as digits as its factorization.

28885141 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20480, while the sum is 37.

The square root of 28885141 is about 5374.4898362542. The cubic root of 28885141 is about 306.8255329720.

The spelling of 28885141 in words is "twenty-eight million, eight hundred eighty-five thousand, one hundred forty-one".