28489047 has 8 divisors (see below), whose sum is σ = 38096256. Its totient is φ = 18937272.

The previous prime is 28489007. The next prime is 28489057. The reversal of 28489047 is 74098482.

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

It is not a de Polignac number, because 28489047 - 2⁸ = 28488791 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28489007) 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, 12643 + ... + 14724.

It is an arithmetic number, because the mean of its divisors is an integer number (4762032).

Almost surely, 2^28489047 is an apocalyptic number.

28489047 is a deficient number, since it is larger than the sum of its proper divisors (9607209).

28489047 is a wasteful number, since it uses less digits than its factorization.

28489047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27717.

The product of its (nonzero) digits is 129024, while the sum is 42.

The square root of 28489047 is about 5337.5131849954. The cubic root of 28489047 is about 305.4166017130.

The spelling of 28489047 in words is "twenty-eight million, four hundred eighty-nine thousand, forty-seven".