28843879 has 4 divisors (see below), whose sum is σ = 28859176. Its totient is φ = 28828584.

The previous prime is 28843877. The next prime is 28843891. The reversal of 28843879 is 97834882.

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 28843879 - 2¹ = 28843877 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 (28843877) 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, 4344 + ... + 8749.

It is an arithmetic number, because the mean of its divisors is an integer number (7214794).

Almost surely, 2^28843879 is an apocalyptic number.

28843879 is a deficient number, since it is larger than the sum of its proper divisors (15297).

28843879 is a wasteful number, since it uses less digits than its factorization.

28843879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15296.

The product of its digits is 774144, while the sum is 49.

The square root of 28843879 is about 5370.6497744686. The cubic root of 28843879 is about 306.6793647599.

The spelling of 28843879 in words is "twenty-eight million, eight hundred forty-three thousand, eight hundred seventy-nine".