28278080880 has 160 divisors (see below), whose sum is σ = 100263820800. Its totient is φ = 6458489856.

The previous prime is 28278080837. The next prime is 28278080881. The reversal of 28278080880 is 8808087282.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28278080881) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2394831 + ... + 2406609.

It is an arithmetic number, because the mean of its divisors is an integer number (626648880).

Almost surely, 2^28278080880 is an apocalyptic number.

28278080880 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 28278080880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50131910400).

28278080880 is an abundant number, since it is smaller than the sum of its proper divisors (71985739920).

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

28278080880 is a wasteful number, since it uses less digits than its factorization.

28278080880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13231 (or 13225 counting only the distinct ones).

The product of its (nonzero) digits is 917504, while the sum is 51.

It can be divided in two parts, 28278080 and 880, that added together give a triangular number (28278960 = T₇₅₂₀).

The spelling of 28278080880 in words is "twenty-eight billion, two hundred seventy-eight million, eighty thousand, eight hundred eighty".