28056877524 has 120 divisors (see below), whose sum is σ = 80071145000. Its totient is φ = 8514533376.

The previous prime is 28056877501. The next prime is 28056877531. The reversal of 28056877524 is 42577865082.

28056877524 is a `hidden beast` number, since 2 + 8 + 0 + 568 + 7 + 75 + 2 + 4 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 478296900 + 27578580624 = 21870^2 + 166068^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 261852 + ... + 353100.

Almost surely, 2^28056877524 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28056877524, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40035572500).

28056877524 is an abundant number, since it is smaller than the sum of its proper divisors (52014267476).

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

28056877524 is a wasteful number, since it uses less digits than its factorization.

28056877524 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91351 (or 91340 counting only the distinct ones).

The product of its (nonzero) digits is 7526400, while the sum is 54.

The spelling of 28056877524 in words is "twenty-eight billion, fifty-six million, eight hundred seventy-seven thousand, five hundred twenty-four".