28167172 has 12 divisors (see below), whose sum is σ = 53773776. Its totient is φ = 12803240.

The previous prime is 28167169. The next prime is 28167179. The reversal of 28167172 is 27176182.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (28167179) 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 3 ways as a sum of consecutive naturals, for example, 320038 + ... + 320125.

It is an arithmetic number, because the mean of its divisors is an integer number (4481148).

Almost surely, 2^28167172 is an apocalyptic number.

28167172 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

28167172 is a deficient number, since it is larger than the sum of its proper divisors (25606604).

28167172 is a wasteful number, since it uses less digits than its factorization.

28167172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 640178 (or 640176 counting only the distinct ones).

The product of its digits is 9408, while the sum is 34.

The square root of 28167172 is about 5307.2753838481. The cubic root of 28167172 is about 304.2620230540.

The spelling of 28167172 in words is "twenty-eight million, one hundred sixty-seven thousand, one hundred seventy-two".