28080647 has 8 divisors (see below), whose sum is σ = 32126976. Its totient is φ = 24043032.

The previous prime is 28080623. The next prime is 28080653. The reversal of 28080647 is 74608082.

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

It is a cyclic number.

It is not a de Polignac number, because 28080647 - 2¹⁸ = 27818503 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28080607) 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, 7778 + ... + 10800.

It is an arithmetic number, because the mean of its divisors is an integer number (4015872).

Almost surely, 2^28080647 is an apocalyptic number.

28080647 is a deficient number, since it is larger than the sum of its proper divisors (4046329).

28080647 is a wasteful number, since it uses less digits than its factorization.

28080647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4357.

The product of its (nonzero) digits is 21504, while the sum is 35.

The square root of 28080647 is about 5299.1175680485. The cubic root of 28080647 is about 303.9501555802.

The spelling of 28080647 in words is "twenty-eight million, eighty thousand, six hundred forty-seven".