28081080000 has 630 divisors, whose sum is σ = 105418720836. Its totient is φ = 7418304000.

The previous prime is 28081079977. The next prime is 28081080007. The reversal of 28081080000 is 8018082.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (28081080007) by changing a digit.

It is a polite number, since it can be written in 89 ways as a sum of consecutive naturals, for example, 262439947 + ... + 262440053.

Almost surely, 2^28081080000 is an apocalyptic number.

28081080000 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 28081080000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52709360418).

28081080000 is an abundant number, since it is smaller than the sum of its proper divisors (77337640836).

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

28081080000 is an frugal number, since it uses more digits than its factorization.

28081080000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163 (or 117 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 27.

Adding to 28081080000 its reverse (8018082), we get a palindrome (28089098082).

The spelling of 28081080000 in words is "twenty-eight billion, eighty-one million, eighty thousand".