28604887 has 2 divisors, whose sum is σ = 28604888. Its totient is φ = 28604886.

The previous prime is 28604881. The next prime is 28604923. The reversal of 28604887 is 78840682.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28604887 - 2¹⁹ = 28080599 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28604881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14302443 + 14302444.

It is an arithmetic number, because the mean of its divisors is an integer number (14302444).

Almost surely, 2^28604887 is an apocalyptic number.

28604887 is a deficient number, since it is larger than the sum of its proper divisors (1).

28604887 is an equidigital number, since it uses as much as digits as its factorization.

28604887 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 172032, while the sum is 43.

The square root of 28604887 is about 5348.3536719256. The cubic root of 28604887 is about 305.8299958471.

The spelling of 28604887 in words is "twenty-eight million, six hundred four thousand, eight hundred eighty-seven".