2001011028 has 12 divisors (see below), whose sum is σ = 4669025760. Its totient is φ = 667003672.

The previous prime is 2001011003. The next prime is 2001011029. The reversal of 2001011028 is 8201101002.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 2001010998 and 2001011016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001011029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83375448 + ... + 83375471.

It is an arithmetic number, because the mean of its divisors is an integer number (389085480).

Almost surely, 2^2001011028 is an apocalyptic number.

It is an amenable number.

2001011028 is an abundant number, since it is smaller than the sum of its proper divisors (2668014732).

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

2001011028 is a wasteful number, since it uses less digits than its factorization.

2001011028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166750926 (or 166750924 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

The square root of 2001011028 is about 44732.6617584959. The cubic root of 2001011028 is about 1260.1333167075.

The spelling of 2001011028 in words is "two billion, one million, eleven thousand, twenty-eight".