28343879 has 4 divisors (see below), whose sum is σ = 30011184. Its totient is φ = 26676576.

The previous prime is 28343873. The next prime is 28343891. The reversal of 28343879 is 97834382.

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 28343879 - 2⁴ = 28343863 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 (28343873) 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, 833627 + ... + 833660.

It is an arithmetic number, because the mean of its divisors is an integer number (7502796).

Almost surely, 2^28343879 is an apocalyptic number.

28343879 is a deficient number, since it is larger than the sum of its proper divisors (1667305).

28343879 is a wasteful number, since it uses less digits than its factorization.

28343879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1667304.

The product of its digits is 290304, while the sum is 44.

The square root of 28343879 is about 5323.8969749611. The cubic root of 28343879 is about 304.8969606250.

The spelling of 28343879 in words is "twenty-eight million, three hundred forty-three thousand, eight hundred seventy-nine".