28745642184 has 128 divisors (see below), whose sum is σ = 88562073600. Its totient is φ = 7590965760.

The previous prime is 28745642161. The next prime is 28745642207. The reversal of 28745642184 is 48124654782.

It is an interprime number because it is at equal distance from previous prime (28745642161) and next prime (28745642207).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21049 + ... + 240695.

It is an arithmetic number, because the mean of its divisors is an integer number (691891200).

Almost surely, 2^28745642184 is an apocalyptic number.

28745642184 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28745642184, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44281036800).

28745642184 is an abundant number, since it is smaller than the sum of its proper divisors (59816431416).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28745642184 is a wasteful number, since it uses less digits than its factorization.

28745642184 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219723 (or 219719 counting only the distinct ones).

The product of its digits is 3440640, while the sum is 51.

The spelling of 28745642184 in words is "twenty-eight billion, seven hundred forty-five million, six hundred forty-two thousand, one hundred eighty-four".