28666017936 has 140 divisors (see below), whose sum is σ = 85959815680. Its totient is φ = 9246985920.

The previous prime is 28666017911. The next prime is 28666018009. The reversal of 28666017936 is 63971066682.

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

It is an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 321945 + ... + 401223.

Almost surely, 2^28666017936 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 28666017936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42979907840).

28666017936 is an abundant number, since it is smaller than the sum of its proper divisors (57293797744).

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

28666017936 is an equidigital number, since it uses as much as digits as its factorization.

28666017936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79336 (or 79315 counting only the distinct ones).

The product of its (nonzero) digits is 3919104, while the sum is 54.

The spelling of 28666017936 in words is "twenty-eight billion, six hundred sixty-six million, seventeen thousand, nine hundred thirty-six".