28166972 has 12 divisors (see below), whose sum is σ = 50882496. Its totient is φ = 13629120.

The previous prime is 28166947. The next prime is 28166989. The reversal of 28166972 is 27966182.

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, 113453 + ... + 113700.

It is an arithmetic number, because the mean of its divisors is an integer number (4240208).

Almost surely, 2^28166972 is an apocalyptic number.

It is an amenable number.

28166972 is a deficient number, since it is larger than the sum of its proper divisors (22715524).

28166972 is a wasteful number, since it uses less digits than its factorization.

28166972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227188 (or 227186 counting only the distinct ones).

The product of its digits is 72576, while the sum is 41.

The square root of 28166972 is about 5307.2565417549. The cubic root of 28166972 is about 304.2613029184.

The spelling of 28166972 in words is "twenty-eight million, one hundred sixty-six thousand, nine hundred seventy-two".