2128372884 has 72 divisors (see below), whose sum is σ = 5895253728. Its totient is φ = 642093120.

The previous prime is 2128372877. The next prime is 2128372969. The reversal of 2128372884 is 4882738212.

It is a super-2 number, since 2×2128372884² = 9059942266692954912, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 78054 + ... + 101730.

It is an arithmetic number, because the mean of its divisors is an integer number (81878524).

Almost surely, 2^2128372884 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2128372884, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2947626864).

2128372884 is an abundant number, since it is smaller than the sum of its proper divisors (3766880844).

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

2128372884 is a wasteful number, since it uses less digits than its factorization.

2128372884 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23925 (or 23920 counting only the distinct ones).

The product of its digits is 344064, while the sum is 45.

The square root of 2128372884 is about 46134.2918445705. The cubic root of 2128372884 is about 1286.3206423928.

The spelling of 2128372884 in words is "two billion, one hundred twenty-eight million, three hundred seventy-two thousand, eight hundred eighty-four".