28085347 has 2 divisors, whose sum is σ = 28085348. Its totient is φ = 28085346.

The previous prime is 28085333. The next prime is 28085353. The reversal of 28085347 is 74358082.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28085347 - 2¹⁵ = 28052579 is a prime.

It is a super-2 number, since 2×28085347² = 1577573432220818, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28005347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14042673 + 14042674.

It is an arithmetic number, because the mean of its divisors is an integer number (14042674).

Almost surely, 2^28085347 is an apocalyptic number.

28085347 is a deficient number, since it is larger than the sum of its proper divisors (1).

28085347 is an equidigital number, since it uses as much as digits as its factorization.

28085347 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 53760, while the sum is 37.

The square root of 28085347 is about 5299.5610195562. The cubic root of 28085347 is about 303.9671125261.

It can be divided in two parts, 280853 and 47, that added together give a square (280900 = 530²).

The spelling of 28085347 in words is "twenty-eight million, eighty-five thousand, three hundred forty-seven".