2143744440 has 64 divisors (see below), whose sum is σ = 6710860800. Its totient is φ = 546809472.

The previous prime is 2143744429. The next prime is 2143744451. The reversal of 2143744440 is 444473412.

It is an interprime number because it is at equal distance from previous prime (2143744429) and next prime (2143744451).

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, 385600 + ... + 391119.

It is an arithmetic number, because the mean of its divisors is an integer number (104857200).

Almost surely, 2^2143744440 is an apocalyptic number.

2143744440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2143744440 is an abundant number, since it is smaller than the sum of its proper divisors (4567116360).

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

2143744440 is a wasteful number, since it uses less digits than its factorization.

2143744440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 776756 (or 776752 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 33.

The square root of 2143744440 is about 46300.5879012351. The cubic root of 2143744440 is about 1289.4099097904.

The spelling of 2143744440 in words is "two billion, one hundred forty-three million, seven hundred forty-four thousand, four hundred forty".