28875641 has 2 divisors, whose sum is σ = 28875642. Its totient is φ = 28875640.

The previous prime is 28875599. The next prime is 28875647. The reversal of 28875641 is 14657882.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28783225 + 92416 = 5365^2 + 304^2 .

It is a cyclic number.

It is not a de Polignac number, because 28875641 - 2¹⁰ = 28874617 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28875647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14437820 + 14437821.

It is an arithmetic number, because the mean of its divisors is an integer number (14437821).

Almost surely, 2^28875641 is an apocalyptic number.

It is an amenable number.

28875641 is a deficient number, since it is larger than the sum of its proper divisors (1).

28875641 is an equidigital number, since it uses as much as digits as its factorization.

28875641 is an odious number, because the sum of its binary digits is odd.

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

The square root of 28875641 is about 5373.6059587580. The cubic root of 28875641 is about 306.7918921210.

The spelling of 28875641 in words is "twenty-eight million, eight hundred seventy-five thousand, six hundred forty-one".