28104006 has 32 divisors (see below), whose sum is σ = 64431360. Its totient is φ = 8005536.

The previous prime is 28103947. The next prime is 28104007. The reversal of 28104006 is 60040182.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28104007) 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 15 ways as a sum of consecutive naturals, for example, 16800 + ... + 18396.

It is an arithmetic number, because the mean of its divisors is an integer number (2013480).

Almost surely, 2^28104006 is an apocalyptic number.

28104006 is an abundant number, since it is smaller than the sum of its proper divisors (36327354).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28104006 is a wasteful number, since it uses less digits than its factorization.

28104006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2028.

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 28104006 is about 5301.3211560893. The cubic root of 28104006 is about 304.0344129441.

Adding to 28104006 its reverse (60040182), we get a palindrome (88144188).

The spelling of 28104006 in words is "twenty-eight million, one hundred four thousand, six".