28156633848 has 192 divisors, whose sum is σ = 89709135360. Its totient is φ = 7809654528.

The previous prime is 28156633837. The next prime is 28156633859. The reversal of 28156633848 is 84833665182.

28156633848 is a `hidden beast` number, since 2 + 8 + 1 + 566 + 3 + 38 + 48 = 666.

It is an interprime number because it is at equal distance from previous prime (28156633837) and next prime (28156633859).

It is a junction number, because it is equal to n+sod(n) for n = 28156633794 and 28156633803.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 9751461 + ... + 9754347.

It is an arithmetic number, because the mean of its divisors is an integer number (467235080).

Almost surely, 2^28156633848 is an apocalyptic number.

28156633848 is a gapful number since it is divisible by the number (28) 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 28156633848, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44854567680).

28156633848 is an abundant number, since it is smaller than the sum of its proper divisors (61552501512).

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

28156633848 is a wasteful number, since it uses less digits than its factorization.

28156633848 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3466 (or 3459 counting only the distinct ones).

The product of its digits is 6635520, while the sum is 54.

The spelling of 28156633848 in words is "twenty-eight billion, one hundred fifty-six million, six hundred thirty-three thousand, eight hundred forty-eight".