3201122728 has 8 divisors (see below), whose sum is σ = 6002105130. Its totient is φ = 1600561360.

The previous prime is 3201122723. The next prime is 3201122753. The reversal of 3201122728 is 8272211023.

3201122728 is digitally balanced in base 2, 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., 2129084164 + 1072038564 = 46142^2 + 32742^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 3201122696 and 3201122705.

It is not an unprimeable number, because it can be changed into a prime (3201122723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200070163 + ... + 200070178.

Almost surely, 2^3201122728 is an apocalyptic number.

It is an amenable number.

3201122728 is a deficient number, since it is larger than the sum of its proper divisors (2800982402).

3201122728 is a wasteful number, since it uses less digits than its factorization.

3201122728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400140347 (or 400140343 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 3201122728 is about 56578.4652319237. The cubic root of 3201122728 is about 1473.7849195263.

The spelling of 3201122728 in words is "three billion, two hundred one million, one hundred twenty-two thousand, seven hundred twenty-eight".