28587641 has 2 divisors, whose sum is σ = 28587642. Its totient is φ = 28587640.

The previous prime is 28587631. The next prime is 28587667. The reversal of 28587641 is 14678582.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14600041 + 13987600 = 3821^2 + 3740^2 .

It is a cyclic number.

It is not a de Polignac number, because 28587641 - 2⁶ = 28587577 is a prime.

It is not a weakly prime, because it can be changed into another prime (28587631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14293820 + 14293821.

It is an arithmetic number, because the mean of its divisors is an integer number (14293821).

Almost surely, 2^28587641 is an apocalyptic number.

It is an amenable number.

28587641 is a deficient number, since it is larger than the sum of its proper divisors (1).

28587641 is an equidigital number, since it uses as much as digits as its factorization.

28587641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 107520, while the sum is 41.

The square root of 28587641 is about 5346.7411570040. The cubic root of 28587641 is about 305.7685214513.

The spelling of 28587641 in words is "twenty-eight million, five hundred eighty-seven thousand, six hundred forty-one".