28871579 has 8 divisors (see below), whose sum is σ = 31546800. Its totient is φ = 26204800.

The previous prime is 28871569. The next prime is 28871597. The reversal of 28871579 is 97517882.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28871579 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28871519) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6647 + ... + 10095.

It is an arithmetic number, because the mean of its divisors is an integer number (3943350).

Almost surely, 2^28871579 is an apocalyptic number.

28871579 is a deficient number, since it is larger than the sum of its proper divisors (2675221).

28871579 is a wasteful number, since it uses less digits than its factorization.

28871579 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4221.

The product of its digits is 282240, while the sum is 47.

The square root of 28871579 is about 5373.2279869739. The cubic root of 28871579 is about 306.7775057494. Note that the first 3 decimals are identical.

The spelling of 28871579 in words is "twenty-eight million, eight hundred seventy-one thousand, five hundred seventy-nine".