28274131828 has 12 divisors (see below), whose sum is σ = 49917605220. Its totient is φ = 14011958912.

The previous prime is 28274131733. The next prime is 28274131829. The reversal of 28274131828 is 82813147282.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 471237264 + 27802894564 = 21708^2 + 166742^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28274131829) 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, 31276243 + ... + 31277146.

It is an arithmetic number, because the mean of its divisors is an integer number (4159800435).

Almost surely, 2^28274131828 is an apocalyptic number.

It is an amenable number.

28274131828 is a deficient number, since it is larger than the sum of its proper divisors (21643473392).

28274131828 is a wasteful number, since it uses less digits than its factorization.

28274131828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62553506 (or 62553504 counting only the distinct ones).

The product of its digits is 344064, while the sum is 46.

The spelling of 28274131828 in words is "twenty-eight billion, two hundred seventy-four million, one hundred thirty-one thousand, eight hundred twenty-eight".