28287351645 has 64 divisors (see below), whose sum is σ = 51987087360. Its totient is φ = 12866151168.

The previous prime is 28287351643. The next prime is 28287351647. The reversal of 28287351645 is 54615378282.

It is an interprime number because it is at equal distance from previous prime (28287351643) and next prime (28287351647).

It is not a de Polignac number, because 28287351645 - 2¹ = 28287351643 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28287351643) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 27225036 + ... + 27226074.

It is an arithmetic number, because the mean of its divisors is an integer number (812298240).

Almost surely, 2^28287351645 is an apocalyptic number.

It is an amenable number.

28287351645 is a deficient number, since it is larger than the sum of its proper divisors (23699735715).

28287351645 is a wasteful number, since it uses less digits than its factorization.

28287351645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2114.

The product of its digits is 3225600, while the sum is 51.

The spelling of 28287351645 in words is "twenty-eight billion, two hundred eighty-seven million, three hundred fifty-one thousand, six hundred forty-five".