28166872 has 16 divisors (see below), whose sum is σ = 53679600. Its totient is φ = 13852320.

The previous prime is 28166869. The next prime is 28166891. The reversal of 28166872 is 27866182.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28372 + ... + 29347.

It is an arithmetic number, because the mean of its divisors is an integer number (3354975).

Almost surely, 2^28166872 is an apocalyptic number.

It is an amenable number.

28166872 is a deficient number, since it is larger than the sum of its proper divisors (25512728).

28166872 is a wasteful number, since it uses less digits than its factorization.

28166872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57786 (or 57782 counting only the distinct ones).

The product of its digits is 64512, while the sum is 40.

The square root of 28166872 is about 5307.2471206832. The cubic root of 28166872 is about 304.2609428493.

The spelling of 28166872 in words is "twenty-eight million, one hundred sixty-six thousand, eight hundred seventy-two".