28093687 has 2 divisors, whose sum is σ = 28093688. Its totient is φ = 28093686.

The previous prime is 28093679. The next prime is 28093697. The reversal of 28093687 is 78639082.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28093687 - 2³ = 28093679 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28093697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14046843 + 14046844.

It is an arithmetic number, because the mean of its divisors is an integer number (14046844).

Almost surely, 2^28093687 is an apocalyptic number.

28093687 is a deficient number, since it is larger than the sum of its proper divisors (1).

28093687 is an equidigital number, since it uses as much as digits as its factorization.

28093687 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 145152, while the sum is 43.

The square root of 28093687 is about 5300.3478187757. The cubic root of 28093687 is about 303.9971974291.

The spelling of 28093687 in words is "twenty-eight million, ninety-three thousand, six hundred eighty-seven".