28534861 has 2 divisors, whose sum is σ = 28534862. Its totient is φ = 28534860.

The previous prime is 28534853. The next prime is 28534871. The reversal of 28534861 is 16843582.

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., 17015625 + 11519236 = 4125^2 + 3394^2 .

It is a cyclic number.

It is not a de Polignac number, because 28534861 - 2³ = 28534853 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28534861.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28534871) 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, 14267430 + 14267431.

It is an arithmetic number, because the mean of its divisors is an integer number (14267431).

Almost surely, 2^28534861 is an apocalyptic number.

It is an amenable number.

28534861 is a deficient number, since it is larger than the sum of its proper divisors (1).

28534861 is an equidigital number, since it uses as much as digits as its factorization.

28534861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46080, while the sum is 37.

The square root of 28534861 is about 5341.8031599826. The cubic root of 28534861 is about 305.5802302400.

The spelling of 28534861 in words is "twenty-eight million, five hundred thirty-four thousand, eight hundred sixty-one".