3201129128 has 8 divisors (see below), whose sum is σ = 6002117130. Its totient is φ = 1600564560.

The previous prime is 3201129103. The next prime is 3201129133. The reversal of 3201129128 is 8219211023.

It can be written as a sum of positive squares in only one way, i.e., 2495801764 + 705327364 = 49958^2 + 26558^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 3201129128.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200070563 + ... + 200070578.

Almost surely, 2^3201129128 is an apocalyptic number.

It is an amenable number.

3201129128 is a deficient number, since it is larger than the sum of its proper divisors (2800988002).

3201129128 is a wasteful number, since it uses less digits than its factorization.

3201129128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400141147 (or 400141143 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 3201129128 is about 56578.5217905169. The cubic root of 3201129128 is about 1473.7859017043.

The spelling of 3201129128 in words is "three billion, two hundred one million, one hundred twenty-nine thousand, one hundred twenty-eight".