2143029840 has 320 divisors, whose sum is σ = 7835688960. Its totient is φ = 474439680.

The previous prime is 2143029839. The next prime is 2143029841. The reversal of 2143029840 is 489203412.

It is an interprime number because it is at equal distance from previous prime (2143029839) and next prime (2143029841).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2143029841) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 8892120 + ... + 8892360.

It is an arithmetic number, because the mean of its divisors is an integer number (24486528).

Almost surely, 2^2143029840 is an apocalyptic number.

2143029840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2143029840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3917844480).

2143029840 is an abundant number, since it is smaller than the sum of its proper divisors (5692659120).

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

2143029840 is a wasteful number, since it uses less digits than its factorization.

2143029840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 410 (or 404 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 2143029840 is about 46292.8702933832. The cubic root of 2143029840 is about 1289.2666223871.

The spelling of 2143029840 in words is "two billion, one hundred forty-three million, twenty-nine thousand, eight hundred forty".