28141291 has 4 divisors (see below), whose sum is σ = 28158232. Its totient is φ = 28124352.

The previous prime is 28141279. The next prime is 28141319. The reversal of 28141291 is 19214182.

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 28141291 - 2⁷ = 28141163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28141231) 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, 5670 + ... + 9403.

It is an arithmetic number, because the mean of its divisors is an integer number (7039558).

Almost surely, 2^28141291 is an apocalyptic number.

28141291 is a deficient number, since it is larger than the sum of its proper divisors (16941).

28141291 is a wasteful number, since it uses less digits than its factorization.

28141291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16940.

The product of its digits is 1152, while the sum is 28.

The square root of 28141291 is about 5304.8365667568. The cubic root of 28141291 is about 304.1688055728.

The spelling of 28141291 in words is "twenty-eight million, one hundred forty-one thousand, two hundred ninety-one".