28104079 has 4 divisors (see below), whose sum is σ = 28114776. Its totient is φ = 28093384.

The previous prime is 28104047. The next prime is 28104107. The reversal of 28104079 is 97040182.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 28104079 - 2⁵ = 28104047 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28104079.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28104379) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1617 + ... + 7669.

It is an arithmetic number, because the mean of its divisors is an integer number (7028694).

Almost surely, 2^28104079 is an apocalyptic number.

28104079 is a deficient number, since it is larger than the sum of its proper divisors (10697).

28104079 is an equidigital number, since it uses as much as digits as its factorization.

28104079 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10696.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 28104079 is about 5301.3280411610. The cubic root of 28104079 is about 304.0346761864.

It can be divided in two parts, 2810 and 4079, that added together give a square (6889 = 83²).

The spelling of 28104079 in words is "twenty-eight million, one hundred four thousand, seventy-nine".