28218452845 has 32 divisors (see below), whose sum is σ = 37401428736. Its totient is φ = 20267366400.

The previous prime is 28218452839. The next prime is 28218452849. The reversal of 28218452845 is 54825481282.

It is not a de Polignac number, because 28218452845 - 2³ = 28218452837 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28218452849) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2592715 + ... + 2603575.

It is an arithmetic number, because the mean of its divisors is an integer number (1168794648).

Almost surely, 2^28218452845 is an apocalyptic number.

It is an amenable number.

28218452845 is a deficient number, since it is larger than the sum of its proper divisors (9182975891).

28218452845 is a wasteful number, since it uses less digits than its factorization.

28218452845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11461.

The product of its digits is 1638400, while the sum is 49.

The spelling of 28218452845 in words is "twenty-eight billion, two hundred eighteen million, four hundred fifty-two thousand, eight hundred forty-five".