2805123328 has 72 divisors (see below), whose sum is σ = 6572293952. Its totient is φ = 1169676288.

The previous prime is 2805123313. The next prime is 2805123337. The reversal of 2805123328 is 8233215082.

It is a junction number, because it is equal to n+sod(n) for n = 2805123293 and 2805123302.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45151 + ... + 87457.

Almost surely, 2^2805123328 is an apocalyptic number.

2805123328 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 2805123328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3286146976).

2805123328 is an abundant number, since it is smaller than the sum of its proper divisors (3767170624).

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

2805123328 is an equidigital number, since it uses as much as digits as its factorization.

2805123328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42367 (or 42353 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 34.

The square root of 2805123328 is about 52963.4149956364. The cubic root of 2805123328 is about 1410.3188803114.

The spelling of 2805123328 in words is "two billion, eight hundred five million, one hundred twenty-three thousand, three hundred twenty-eight".