28167271 has 4 divisors (see below), whose sum is σ = 30727944. Its totient is φ = 25606600.

The previous prime is 28167263. The next prime is 28167277. The reversal of 28167271 is 17276182.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28167271 - 2³ = 28167263 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 (28167277) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1280320 + ... + 1280341.

It is an arithmetic number, because the mean of its divisors is an integer number (7681986).

Almost surely, 2^28167271 is an apocalyptic number.

28167271 is a deficient number, since it is larger than the sum of its proper divisors (2560673).

28167271 is a wasteful number, since it uses less digits than its factorization.

28167271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2560672.

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

The square root of 28167271 is about 5307.2847106595. The cubic root of 28167271 is about 304.2623795198.

The spelling of 28167271 in words is "twenty-eight million, one hundred sixty-seven thousand, two hundred seventy-one".