28118023 has 8 divisors (see below), whose sum is σ = 30026880. Its totient is φ = 26271840.

The previous prime is 28118003. The next prime is 28118033. The reversal of 28118023 is 32081182.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28118023 - 2¹⁷ = 27986951 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28118003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14740 + ... + 16537.

It is an arithmetic number, because the mean of its divisors is an integer number (3753360).

Almost surely, 2^28118023 is an apocalyptic number.

28118023 is a deficient number, since it is larger than the sum of its proper divisors (1908857).

28118023 is a wasteful number, since it uses less digits than its factorization.

28118023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31337.

The product of its (nonzero) digits is 768, while the sum is 25.

The square root of 28118023 is about 5302.6430202306. The cubic root of 28118023 is about 304.0849507222.

The spelling of 28118023 in words is "twenty-eight million, one hundred eighteen thousand, twenty-three".