28485811 has 2 divisors, whose sum is σ = 28485812. Its totient is φ = 28485810.

The previous prime is 28485803. The next prime is 28485851. The reversal of 28485811 is 11858482.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28485811 - 2³ = 28485803 is a prime.

It is a super-2 number, since 2×28485811² = 1622882856655442, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28485851) 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, 14242905 + 14242906.

It is an arithmetic number, because the mean of its divisors is an integer number (14242906).

Almost surely, 2^28485811 is an apocalyptic number.

28485811 is a deficient number, since it is larger than the sum of its proper divisors (1).

28485811 is an equidigital number, since it uses as much as digits as its factorization.

28485811 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20480, while the sum is 37.

The square root of 28485811 is about 5337.2100389623. The cubic root of 28485811 is about 305.4050374377.

The spelling of 28485811 in words is "twenty-eight million, four hundred eighty-five thousand, eight hundred eleven".