28065784000 has 112 divisors (see below), whose sum is σ = 69595752096. Its totient is φ = 11211648000.

The previous prime is 28065783989. The next prime is 28065784003. The reversal of 28065784000 is 48756082.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is not an unprimeable number, because it can be changed into a prime (28065784003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7766194 + ... + 7769806.

Almost surely, 2^28065784000 is an apocalyptic number.

28065784000 is a gapful number since it is divisible by the number (20) 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 28065784000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34797876048).

28065784000 is an abundant number, since it is smaller than the sum of its proper divisors (41529968096).

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

28065784000 is an equidigital number, since it uses as much as digits as its factorization.

28065784000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4611 (or 4591 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 40.

The spelling of 28065784000 in words is "twenty-eight billion, sixty-five million, seven hundred eighty-four thousand".