28170039 has 8 divisors (see below), whose sum is σ = 37799920. Its totient is φ = 18660096.

The previous prime is 28170007. The next prime is 28170053. The reversal of 28170039 is 93007182.

It is a happy number.

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

It is not a de Polignac number, because 28170039 - 2⁵ = 28170007 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28169988 and 28170015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28170059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29434 + ... + 30375.

It is an arithmetic number, because the mean of its divisors is an integer number (4724990).

Almost surely, 2^28170039 is an apocalyptic number.

28170039 is a deficient number, since it is larger than the sum of its proper divisors (9629881).

28170039 is a wasteful number, since it uses less digits than its factorization.

28170039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59969.

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 28170039 is about 5307.5454779022. The cubic root of 28170039 is about 304.2723458229.

The spelling of 28170039 in words is "twenty-eight million, one hundred seventy thousand, thirty-nine".