28618163 has 4 divisors (see below), whose sum is σ = 32706480. Its totient is φ = 24529848.

The previous prime is 28618153. The next prime is 28618171. The reversal of 28618163 is 36181682.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36181682 = 2 ⋅18090841.

It is not a de Polignac number, because 28618163 - 2⁴ = 28618147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28618133) 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, 2044148 + ... + 2044161.

It is an arithmetic number, because the mean of its divisors is an integer number (8176620).

Almost surely, 2^28618163 is an apocalyptic number.

28618163 is a deficient number, since it is larger than the sum of its proper divisors (4088317).

28618163 is an equidigital number, since it uses as much as digits as its factorization.

28618163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4088316.

The product of its digits is 13824, while the sum is 35.

The square root of 28618163 is about 5349.5946575418. The cubic root of 28618163 is about 305.8773021116.

The spelling of 28618163 in words is "twenty-eight million, six hundred eighteen thousand, one hundred sixty-three".