28605427 has 2 divisors, whose sum is σ = 28605428. Its totient is φ = 28605426.

The previous prime is 28605391. The next prime is 28605433. The reversal of 28605427 is 72450682.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28605427 - 2⁷ = 28605299 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28605392 and 28605401.

It is not a weakly prime, because it can be changed into another prime (28605457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14302713 + 14302714.

It is an arithmetic number, because the mean of its divisors is an integer number (14302714).

Almost surely, 2^28605427 is an apocalyptic number.

28605427 is a deficient number, since it is larger than the sum of its proper divisors (1).

28605427 is an equidigital number, since it uses as much as digits as its factorization.

28605427 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26880, while the sum is 34.

The square root of 28605427 is about 5348.4041545119. The cubic root of 28605427 is about 305.8319203103.

The spelling of 28605427 in words is "twenty-eight million, six hundred five thousand, four hundred twenty-seven".