28056163 has 4 divisors (see below), whose sum is σ = 28440568. Its totient is φ = 27671760.

The previous prime is 28056143. The next prime is 28056187. The reversal of 28056163 is 36165082.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36165082 = 2 ⋅18082541.

It is a cyclic number.

It is not a de Polignac number, because 28056163 - 2¹⁷ = 27925091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28056143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 192093 + ... + 192238.

It is an arithmetic number, because the mean of its divisors is an integer number (7110142).

Almost surely, 2^28056163 is an apocalyptic number.

28056163 is a deficient number, since it is larger than the sum of its proper divisors (384405).

28056163 is an equidigital number, since it uses as much as digits as its factorization.

28056163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 384404.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 28056163 is about 5296.8068682934. The cubic root of 28056163 is about 303.8617901000.

The spelling of 28056163 in words is "twenty-eight million, fifty-six thousand, one hundred sixty-three".