28104747 has 8 divisors (see below), whose sum is σ = 40879680. Its totient is φ = 17033160.

The previous prime is 28104737. The next prime is 28104761. The reversal of 28104747 is 74740182.

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

It is not a de Polignac number, because 28104747 - 2⁷ = 28104619 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33), and also a Moran number because the ratio is a prime number: 851659 = 28104747 / (2 + 8 + 1 + 0 + 4 + 7 + 4 + 7).

It is not an unprimeable number, because it can be changed into a prime (28104737) 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, 425797 + ... + 425862.

It is an arithmetic number, because the mean of its divisors is an integer number (5109960).

Almost surely, 2^28104747 is an apocalyptic number.

28104747 is a deficient number, since it is larger than the sum of its proper divisors (12774933).

28104747 is a wasteful number, since it uses less digits than its factorization.

28104747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 851673.

The product of its (nonzero) digits is 12544, while the sum is 33.

The square root of 28104747 is about 5301.3910438676. The cubic root of 28104747 is about 304.0370850130.

It can be divided in two parts, 2810 and 4747, that added together give a palindrome (7557).

The spelling of 28104747 in words is "twenty-eight million, one hundred four thousand, seven hundred forty-seven".