28564163 has 4 divisors (see below), whose sum is σ = 30067560. Its totient is φ = 27060768.

The previous prime is 28564147. The next prime is 28564171. The reversal of 28564163 is 36146582.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36146582 = 2 ⋅18073291.

It is a cyclic number.

It is not a de Polignac number, because 28564163 - 2⁴ = 28564147 is a prime.

It is a super-2 number, since 2×28564163² = 1631822815781138, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28564103) 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, 751670 + ... + 751707.

It is an arithmetic number, because the mean of its divisors is an integer number (7516890).

Almost surely, 2^28564163 is an apocalyptic number.

28564163 is a deficient number, since it is larger than the sum of its proper divisors (1503397).

28564163 is a wasteful number, since it uses less digits than its factorization.

28564163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1503396.

The product of its digits is 34560, while the sum is 35.

The square root of 28564163 is about 5344.5451630611. The cubic root of 28564163 is about 305.6847929678.

The spelling of 28564163 in words is "twenty-eight million, five hundred sixty-four thousand, one hundred sixty-three".