28419641 has 2 divisors, whose sum is σ = 28419642. Its totient is φ = 28419640.

The previous prime is 28419619. The next prime is 28419661. The reversal of 28419641 is 14691482.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17397241 + 11022400 = 4171^2 + 3320^2 .

It is a cyclic number.

It is not a de Polignac number, because 28419641 - 2⁶ = 28419577 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (28419661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14209820 + 14209821.

It is an arithmetic number, because the mean of its divisors is an integer number (14209821).

Almost surely, 2^28419641 is an apocalyptic number.

It is an amenable number.

28419641 is a deficient number, since it is larger than the sum of its proper divisors (1).

28419641 is an equidigital number, since it uses as much as digits as its factorization.

28419641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13824, while the sum is 35.

The square root of 28419641 is about 5331.0075032774. The cubic root of 28419641 is about 305.1683778696.

The spelling of 28419641 in words is "twenty-eight million, four hundred nineteen thousand, six hundred forty-one".