28201271 has 16 divisors (see below), whose sum is σ = 32970240. Its totient is φ = 23624160.

The previous prime is 28201267. The next prime is 28201273. The reversal of 28201271 is 17210282.

It is not a de Polignac number, because 28201271 - 2² = 28201267 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 (28201273) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 88805 + ... + 89121.

It is an arithmetic number, because the mean of its divisors is an integer number (2060640).

Almost surely, 2^28201271 is an apocalyptic number.

28201271 is a deficient number, since it is larger than the sum of its proper divisors (4768969).

28201271 is a wasteful number, since it uses less digits than its factorization.

28201271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 574.

The product of its (nonzero) digits is 448, while the sum is 23.

The square root of 28201271 is about 5310.4868891656. The cubic root of 28201271 is about 304.3847527679.

The spelling of 28201271 in words is "twenty-eight million, two hundred one thousand, two hundred seventy-one".