2143938140 has 48 divisors (see below), whose sum is σ = 4591762560. Its totient is φ = 840690240.

The previous prime is 2143938091. The next prime is 2143938163. The reversal of 2143938140 is 418393412.

It is a self number, because there is not a number n which added to its sum of digits gives 2143938140.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 212531 + ... + 222389.

It is an arithmetic number, because the mean of its divisors is an integer number (95661720).

Almost surely, 2^2143938140 is an apocalyptic number.

2143938140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2143938140 is an abundant number, since it is smaller than the sum of its proper divisors (2447824420).

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

2143938140 is a wasteful number, since it uses less digits than its factorization.

2143938140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10082 (or 10080 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 2143938140 is about 46302.6796200825. The cubic root of 2143938140 is about 1289.4487438934.

The spelling of 2143938140 in words is "two billion, one hundred forty-three million, nine hundred thirty-eight thousand, one hundred forty".