28139874048 has 432 divisors, whose sum is σ = 95995920384. Its totient is φ = 7815536640.

The previous prime is 28139874029. The next prime is 28139874073. The reversal of 28139874048 is 84047893182.

It is a happy number.

28139874048 is a `hidden beast` number, since 28 + 139 + 87 + 404 + 8 = 666.

It is a super-2 number, since 2×28139874048² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28139873985 and 28139874003.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 73472065 + ... + 73472447.

Almost surely, 2^28139874048 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 28139874048, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47997960192).

28139874048 is an abundant number, since it is smaller than the sum of its proper divisors (67856046336).

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

28139874048 is a wasteful number, since it uses less digits than its factorization.

28139874048 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 652 (or 635 counting only the distinct ones).

The product of its (nonzero) digits is 3096576, while the sum is 54.

The spelling of 28139874048 in words is "twenty-eight billion, one hundred thirty-nine million, eight hundred seventy-four thousand, forty-eight".