28701271 has 16 divisors (see below), whose sum is σ = 30844800. Its totient is φ = 26656000.

The previous prime is 28701269. The next prime is 28701311. The reversal of 28701271 is 17210782.

It is a cyclic number.

It is not a de Polignac number, because 28701271 - 2¹ = 28701269 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 (28701221) 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, 119970 + ... + 120208.

It is an arithmetic number, because the mean of its divisors is an integer number (1927800).

Almost surely, 2^28701271 is an apocalyptic number.

28701271 is a deficient number, since it is larger than the sum of its proper divisors (2143529).

28701271 is a wasteful number, since it uses less digits than its factorization.

28701271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 410.

The product of its (nonzero) digits is 1568, while the sum is 28.

The square root of 28701271 is about 5357.3567176360. The cubic root of 28701271 is about 306.1731082262.

The spelling of 28701271 in words is "twenty-eight million, seven hundred one thousand, two hundred seventy-one".