28146271 has 4 divisors (see below), whose sum is σ = 29801952. Its totient is φ = 26490592.

The previous prime is 28146263. The next prime is 28146281. The reversal of 28146271 is 17264182.

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 28146271 - 2³ = 28146263 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28146221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 827815 + ... + 827848.

It is an arithmetic number, because the mean of its divisors is an integer number (7450488).

Almost surely, 2^28146271 is an apocalyptic number.

28146271 is a deficient number, since it is larger than the sum of its proper divisors (1655681).

28146271 is a wasteful number, since it uses less digits than its factorization.

28146271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1655680.

The product of its digits is 5376, while the sum is 31.

The square root of 28146271 is about 5305.3059289734. The cubic root of 28146271 is about 304.1867468406.

The spelling of 28146271 in words is "twenty-eight million, one hundred forty-six thousand, two hundred seventy-one".