28175071 has 4 divisors (see below), whose sum is σ = 28343952. Its totient is φ = 28006192.

The previous prime is 28175047. The next prime is 28175089. The reversal of 28175071 is 17057182.

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 28175071 - 2⁷ = 28174943 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 (28175011) 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, 84190 + ... + 84523.

It is an arithmetic number, because the mean of its divisors is an integer number (7085988).

Almost surely, 2^28175071 is an apocalyptic number.

28175071 is a deficient number, since it is larger than the sum of its proper divisors (168881).

28175071 is a wasteful number, since it uses less digits than its factorization.

28175071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168880.

The product of its (nonzero) digits is 3920, while the sum is 31.

The square root of 28175071 is about 5308.0194988338. The cubic root of 28175071 is about 304.2904620833.

The spelling of 28175071 in words is "twenty-eight million, one hundred seventy-five thousand, seventy-one".