2128726028 has 144 divisors (see below), whose sum is σ = 4722510240. Its totient is φ = 832291200.

The previous prime is 2128726007. The next prime is 2128726087. The reversal of 2128726028 is 8206278212.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a junction number, because it is equal to n+sod(n) for n = 2128725982 and 2128726000.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 34897118 + ... + 34897178.

It is an arithmetic number, because the mean of its divisors is an integer number (32795210).

Almost surely, 2^2128726028 is an apocalyptic number.

It is an amenable number.

2128726028 is an abundant number, since it is smaller than the sum of its proper divisors (2593784212).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2128726028 is a wasteful number, since it uses less digits than its factorization.

2128726028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153 (or 106 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 38.

The square root of 2128726028 is about 46138.1190340482. The cubic root of 2128726028 is about 1286.3917814460.

The spelling of 2128726028 in words is "two billion, one hundred twenty-eight million, seven hundred twenty-six thousand, twenty-eight".