2805728084 has 6 divisors (see below), whose sum is σ = 4910024154. Its totient is φ = 1402864040.

The previous prime is 2805728077. The next prime is 2805728111. The reversal of 2805728084 is 4808275082.

It can be written as a sum of positive squares in only one way, i.e., 2467903684 + 337824400 = 49678^2 + 18380^2 .

It is a super-2 number, since 2×2805728084² = 15744220162692622112, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 350716007 + ... + 350716014.

It is an arithmetic number, because the mean of its divisors is an integer number (818337359).

Almost surely, 2^2805728084 is an apocalyptic number.

It is an amenable number.

2805728084 is a deficient number, since it is larger than the sum of its proper divisors (2104296070).

2805728084 is a wasteful number, since it uses less digits than its factorization.

2805728084 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 701432025 (or 701432023 counting only the distinct ones).

The product of its (nonzero) digits is 286720, while the sum is 44.

The square root of 2805728084 is about 52969.1238741967. The cubic root of 2805728084 is about 1410.4202231545.

The spelling of 2805728084 in words is "two billion, eight hundred five million, seven hundred twenty-eight thousand, eighty-four".