2143887756 has 24 divisors (see below), whose sum is σ = 5174902320. Its totient is φ = 689986752.

The previous prime is 2143887749. The next prime is 2143887769. The reversal of 2143887756 is 6577883412.

It is a junction number, because it is equal to n+sod(n) for n = 2143887699 and 2143887708.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3079951 + ... + 3080646.

It is an arithmetic number, because the mean of its divisors is an integer number (215620930).

Almost surely, 2^2143887756 is an apocalyptic number.

It is an amenable number.

2143887756 is an abundant number, since it is smaller than the sum of its proper divisors (3031014564).

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

2143887756 is a wasteful number, since it uses less digits than its factorization.

2143887756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6160633 (or 6160631 counting only the distinct ones).

The product of its digits is 2257920, while the sum is 51.

The square root of 2143887756 is about 46302.1355447025. The cubic root of 2143887756 is about 1289.4386428410.

The spelling of 2143887756 in words is "two billion, one hundred forty-three million, eight hundred eighty-seven thousand, seven hundred fifty-six".