28118575 has 12 divisors (see below), whose sum is σ = 36702760. Its totient is φ = 21310560.

The previous prime is 28118569. The next prime is 28118591. The reversal of 28118575 is 57581182.

It is not a de Polignac number, because 28118575 - 2⁹ = 28118063 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29124 + ... + 30073.

Almost surely, 2^28118575 is an apocalyptic number.

28118575 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28118575 is a deficient number, since it is larger than the sum of its proper divisors (8584185).

28118575 is a wasteful number, since it uses less digits than its factorization.

28118575 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59226 (or 59221 counting only the distinct ones).

The product of its digits is 22400, while the sum is 37.

The square root of 28118575 is about 5302.6950694906. The cubic root of 28118575 is about 304.0869405941.

The spelling of 28118575 in words is "twenty-eight million, one hundred eighteen thousand, five hundred seventy-five".