28282879 has 4 divisors (see below), whose sum is σ = 28439320. Its totient is φ = 28126440.

The previous prime is 28282853. The next prime is 28282897. The reversal of 28282879 is 97828282.

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 28282879 - 2¹¹ = 28280831 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 (28282829) 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, 77949 + ... + 78310.

It is an arithmetic number, because the mean of its divisors is an integer number (7109830).

Almost surely, 2^28282879 is an apocalyptic number.

28282879 is a deficient number, since it is larger than the sum of its proper divisors (156441).

28282879 is a wasteful number, since it uses less digits than its factorization.

28282879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156440.

The product of its digits is 258048, while the sum is 46.

The square root of 28282879 is about 5318.1650030814. The cubic root of 28282879 is about 304.6780765299.

It can be divided in two parts, 28282 and 879, that added together give a triangular number (29161 = T₂₄₁).

The spelling of 28282879 in words is "twenty-eight million, two hundred eighty-two thousand, eight hundred seventy-nine".