28026039 has 4 divisors (see below), whose sum is σ = 37368056. Its totient is φ = 18684024.

The previous prime is 28026017. The next prime is 28026073. The reversal of 28026039 is 93062082.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 28026039 - 2¹¹ = 28023991 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28025997 and 28026015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28026079) 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, 4671004 + ... + 4671009.

It is an arithmetic number, because the mean of its divisors is an integer number (9342014).

Almost surely, 2^28026039 is an apocalyptic number.

28026039 is a deficient number, since it is larger than the sum of its proper divisors (9342017).

28026039 is an equidigital number, since it uses as much as digits as its factorization.

28026039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9342016.

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 28026039 is about 5293.9625045895. The cubic root of 28026039 is about 303.7529986664.

The spelling of 28026039 in words is "twenty-eight million, twenty-six thousand, thirty-nine".