28022147 has 12 divisors (see below), whose sum is σ = 29425368. Its totient is φ = 26664000.

The previous prime is 28022143. The next prime is 28022153. The reversal of 28022147 is 74122082.

It is not a de Polignac number, because 28022147 - 2² = 28022143 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28022143) 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 in 11 ways as a sum of consecutive naturals, for example, 277397 + ... + 277497.

It is an arithmetic number, because the mean of its divisors is an integer number (2452114).

Almost surely, 2^28022147 is an apocalyptic number.

28022147 is a deficient number, since it is larger than the sum of its proper divisors (1403221).

28022147 is an equidigital number, since it uses as much as digits as its factorization.

28022147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310 (or 209 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 26.

The square root of 28022147 is about 5293.5949032770. The cubic root of 28022147 is about 303.7389372026.

The spelling of 28022147 in words is "twenty-eight million, twenty-two thousand, one hundred forty-seven".