28281039 has 8 divisors (see below), whose sum is σ = 37842432. Its totient is φ = 18786840.

The previous prime is 28281037. The next prime is 28281041. The reversal of 28281039 is 93018282.

It is an interprime number because it is at equal distance from previous prime (28281037) and next prime (28281041).

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

It is not a de Polignac number, because 28281039 - 2¹ = 28281037 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28281037) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15807 + ... + 17504.

It is an arithmetic number, because the mean of its divisors is an integer number (4730304).

Almost surely, 2^28281039 is an apocalyptic number.

28281039 is a deficient number, since it is larger than the sum of its proper divisors (9561393).

28281039 is a wasteful number, since it uses less digits than its factorization.

28281039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33597.

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 28281039 is about 5317.9920082678. The cubic root of 28281039 is about 304.6714692368.

The spelling of 28281039 in words is "twenty-eight million, two hundred eighty-one thousand, thirty-nine".