28045671 has 16 divisors (see below), whose sum is σ = 39191040. Its totient is φ = 17805920.

The previous prime is 28045609. The next prime is 28045679. The reversal of 28045671 is 17654082.

It is a cyclic number.

It is not a de Polignac number, because 28045671 - 2¹⁵ = 28012903 is a prime.

It is a Smith number, since the sum of its digits (33) 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 (28045679) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17806 + ... + 19316.

It is an arithmetic number, because the mean of its divisors is an integer number (2449440).

Almost surely, 2^28045671 is an apocalyptic number.

28045671 is a deficient number, since it is larger than the sum of its proper divisors (11145369).

28045671 is a wasteful number, since it uses less digits than its factorization.

28045671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1806.

The product of its (nonzero) digits is 13440, while the sum is 33.

The square root of 28045671 is about 5295.8163676623. The cubic root of 28045671 is about 303.8239075689.

The spelling of 28045671 in words is "twenty-eight million, forty-five thousand, six hundred seventy-one".