2128722328 has 8 divisors (see below), whose sum is σ = 3991354380. Its totient is φ = 1064361160.

The previous prime is 2128722317. The next prime is 2128722341. The reversal of 2128722328 is 8232278212.

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

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

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, 133045138 + ... + 133045153.

Almost surely, 2^2128722328 is an apocalyptic number.

It is an amenable number.

2128722328 is a deficient number, since it is larger than the sum of its proper divisors (1862632052).

2128722328 is a wasteful number, since it uses less digits than its factorization.

2128722328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266090297 (or 266090293 counting only the distinct ones).

The product of its digits is 43008, while the sum is 37.

The square root of 2128722328 is about 46138.0789370342. The cubic root of 2128722328 is about 1286.3910361407.

The spelling of 2128722328 in words is "two billion, one hundred twenty-eight million, seven hundred twenty-two thousand, three hundred twenty-eight".