28279043 has 4 divisors (see below), whose sum is σ = 30454368. Its totient is φ = 26103720.

The previous prime is 28279039. The next prime is 28279067. The reversal of 28279043 is 34097282.

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 28279043 - 2² = 28279039 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28278994 and 28279012.

It is not an unprimeable number, because it can be changed into a prime (28279093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1087643 + ... + 1087668.

It is an arithmetic number, because the mean of its divisors is an integer number (7613592).

Almost surely, 2^28279043 is an apocalyptic number.

28279043 is a deficient number, since it is larger than the sum of its proper divisors (2175325).

28279043 is a wasteful number, since it uses less digits than its factorization.

28279043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2175324.

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 28279043 is about 5317.8043401389. The cubic root of 28279043 is about 304.6643014360.

The spelling of 28279043 in words is "twenty-eight million, two hundred seventy-nine thousand, forty-three".