28070843 has 4 divisors (see below), whose sum is σ = 28546680. Its totient is φ = 27595008.

The previous prime is 28070839. The next prime is 28070851. The reversal of 28070843 is 34807082.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34807082 = 2 ⋅17403541.

It is not a de Polignac number, because 28070843 - 2² = 28070839 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28070813) 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, 237830 + ... + 237947.

It is an arithmetic number, because the mean of its divisors is an integer number (7136670).

Almost surely, 2^28070843 is an apocalyptic number.

28070843 is a deficient number, since it is larger than the sum of its proper divisors (475837).

28070843 is an equidigital number, since it uses as much as digits as its factorization.

28070843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 475836.

The product of its (nonzero) digits is 10752, while the sum is 32.

The square root of 28070843 is about 5298.1924276115. The cubic root of 28070843 is about 303.9147780217.

The spelling of 28070843 in words is "twenty-eight million, seventy thousand, eight hundred forty-three".