28149518828 has 12 divisors (see below), whose sum is σ = 49282735320. Its totient is φ = 14068737312.

The previous prime is 28149518821. The next prime is 28149518861. The reversal of 28149518828 is 82881594182.

It is not an unprimeable number, because it can be changed into a prime (28149518821) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1495001 + ... + 1513712.

It is an arithmetic number, because the mean of its divisors is an integer number (4106894610).

Almost surely, 2^28149518828 is an apocalyptic number.

It is an amenable number.

28149518828 is a deficient number, since it is larger than the sum of its proper divisors (21133216492).

28149518828 is a wasteful number, since it uses less digits than its factorization.

28149518828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3011056 (or 3011054 counting only the distinct ones).

The product of its digits is 2949120, while the sum is 56.

The spelling of 28149518828 in words is "twenty-eight billion, one hundred forty-nine million, five hundred eighteen thousand, eight hundred twenty-eight".