28073539 has 8 divisors (see below), whose sum is σ = 30936752. Its totient is φ = 25310880.

The previous prime is 28073533. The next prime is 28073567. The reversal of 28073539 is 93537082.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28073539 - 2⁹ = 28073027 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28073498 and 28073507.

It is not an unprimeable number, because it can be changed into a prime (28073533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24552 + ... + 25669.

It is an arithmetic number, because the mean of its divisors is an integer number (3867094).

Almost surely, 2^28073539 is an apocalyptic number.

28073539 is a deficient number, since it is larger than the sum of its proper divisors (2863213).

28073539 is a wasteful number, since it uses less digits than its factorization.

28073539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50277.

The product of its (nonzero) digits is 45360, while the sum is 37.

The square root of 28073539 is about 5298.4468478980. The cubic root of 28073539 is about 303.9245073105.

The spelling of 28073539 in words is "twenty-eight million, seventy-three thousand, five hundred thirty-nine".