28943087 has 2 divisors, whose sum is σ = 28943088. Its totient is φ = 28943086.

The previous prime is 28943069. The next prime is 28943147. The reversal of 28943087 is 78034982.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28943087 - 2¹⁰ = 28942063 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28943017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14471543 + 14471544.

It is an arithmetic number, because the mean of its divisors is an integer number (14471544).

Almost surely, 2^28943087 is an apocalyptic number.

28943087 is a deficient number, since it is larger than the sum of its proper divisors (1).

28943087 is an equidigital number, since it uses as much as digits as its factorization.

28943087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96768, while the sum is 41.

The square root of 28943087 is about 5379.8779725938. The cubic root of 28943087 is about 307.0305684565.

The spelling of 28943087 in words is "twenty-eight million, nine hundred forty-three thousand, eighty-seven".