2800128 has 40 divisors (see below), whose sum is σ = 7463808. Its totient is φ = 932864.

The previous prime is 2800103. The next prime is 2800139. The reversal of 2800128 is 8210082.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 625 + ... + 2447.

2^2800128 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 2800128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3731904).

2800128 is an abundant number, since it is smaller than the sum of its proper divisors (4663680).

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

2800128 is an equidigital number, since it uses as much as digits as its factorization.

2800128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1844 (or 1828 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 21.

The square root of 2800128 is about 1673.3582999465. The cubic root of 2800128 is about 140.9481223568.

The spelling of 2800128 in words is "two million, eight hundred thousand, one hundred twenty-eight".