28133277696 has 600 divisors, whose sum is σ = 94203814320. Its totient is φ = 8323596288.

The previous prime is 28133277691. The next prime is 28133277707. The reversal of 28133277696 is 69677233182.

28133277696 is a `hidden beast` number, since 281 + 3 + 3 + 277 + 6 + 96 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28133277691) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 654262251 + ... + 654262293.

Almost surely, 2^28133277696 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 28133277696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47101907160).

28133277696 is an abundant number, since it is smaller than the sum of its proper divisors (66070536624).

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

28133277696 is an equidigital number, since it uses as much as digits as its factorization.

28133277696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129 (or 94 counting only the distinct ones).

The product of its digits is 4572288, while the sum is 54.

The spelling of 28133277696 in words is "twenty-eight billion, one hundred thirty-three million, two hundred seventy-seven thousand, six hundred ninety-six".