28766107188 has 162 divisors, whose sum is σ = 91594131174. Its totient is φ = 7586587008.

The previous prime is 28766107121. The next prime is 28766107193. The reversal of 28766107188 is 88170166782.

It is a happy number.

28766107188 is a `hidden beast` number, since 2 + 8 + 7 + 6 + 610 + 7 + 18 + 8 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 1089792144 + 27676315044 = 33012^2 + 166362^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 249870 + ... + 346362.

Almost surely, 2^28766107188 is an apocalyptic number.

28766107188 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 28766107188, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45797065587).

28766107188 is an abundant number, since it is smaller than the sum of its proper divisors (62828023986).

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

28766107188 is a wasteful number, since it uses less digits than its factorization.

28766107188 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96543 (or 96518 counting only the distinct ones).

The product of its (nonzero) digits is 1806336, while the sum is 54.

The spelling of 28766107188 in words is "twenty-eight billion, seven hundred sixty-six million, one hundred seven thousand, one hundred eighty-eight".