28668175 has 6 divisors (see below), whose sum is σ = 35548568. Its totient is φ = 22934520.

The previous prime is 28668173. The next prime is 28668181. The reversal of 28668175 is 57186682.

It is not a de Polignac number, because 28668175 - 2¹ = 28668173 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 (28668173) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 573339 + ... + 573388.

Almost surely, 2^28668175 is an apocalyptic number.

28668175 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28668175 is a deficient number, since it is larger than the sum of its proper divisors (6880393).

28668175 is a wasteful number, since it uses less digits than its factorization.

28668175 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1146737 (or 1146732 counting only the distinct ones).

The product of its digits is 161280, while the sum is 43.

The square root of 28668175 is about 5354.2669899810. The cubic root of 28668175 is about 306.0553782183.

The spelling of 28668175 in words is "twenty-eight million, six hundred sixty-eight thousand, one hundred seventy-five".