2001997888 has 28 divisors (see below), whose sum is σ = 4333871952. Its totient is φ = 909998720.

The previous prime is 2001997883. The next prime is 2001997889. The reversal of 2001997888 is 8887991002.

It is not an unprimeable number, because it can be changed into a prime (2001997883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1421170 + ... + 1422577.

Almost surely, 2^2001997888 is an apocalyptic number.

It is an amenable number.

2001997888 is an abundant number, since it is smaller than the sum of its proper divisors (2331874064).

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

2001997888 is a wasteful number, since it uses less digits than its factorization.

2001997888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2843770 (or 2843760 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 52.

The square root of 2001997888 is about 44743.6910413077. The cubic root of 2001997888 is about 1260.3404404677.

The spelling of 2001997888 in words is "two billion, one million, nine hundred ninety-seven thousand, eight hundred eighty-eight".