28815443 has 2 divisors, whose sum is σ = 28815444. Its totient is φ = 28815442.

The previous prime is 28815407. The next prime is 28815463. The reversal of 28815443 is 34451882.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28815443 - 2⁶ = 28815379 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28815403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14407721 + 14407722.

It is an arithmetic number, because the mean of its divisors is an integer number (14407722).

Almost surely, 2^28815443 is an apocalyptic number.

28815443 is a deficient number, since it is larger than the sum of its proper divisors (1).

28815443 is an equidigital number, since it uses as much as digits as its factorization.

28815443 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30720, while the sum is 35.

The square root of 28815443 is about 5368.0017697464. The cubic root of 28815443 is about 306.5785507444.

The spelling of 28815443 in words is "twenty-eight million, eight hundred fifteen thousand, four hundred forty-three".