2801728 has 14 divisors (see below), whose sum is σ = 5559806. Its totient is φ = 1400832.

The previous prime is 2801713. The next prime is 2801737. The reversal of 2801728 is 8271082.

2801728 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 1617984 + 1183744 = 1272^2 + 1088^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2801696 and 2801705.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21825 + ... + 21952.

It is an arithmetic number, because the mean of its divisors is an integer number (397129).

2^2801728 is an apocalyptic number.

It is an amenable number.

2801728 is a deficient number, since it is larger than the sum of its proper divisors (2758078).

2801728 is an equidigital number, since it uses as much as digits as its factorization.

2801728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43789 (or 43779 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 28.

The square root of 2801728 is about 1673.8363121883. The cubic root of 2801728 is about 140.9749632792.

The spelling of 2801728 in words is "two million, eight hundred one thousand, seven hundred twenty-eight".