2143020440 has 64 divisors (see below), whose sum is σ = 5268684960. Its totient is φ = 778014720.

The previous prime is 2143020433. The next prime is 2143020491. The reversal of 2143020440 is 440203412.

It is a Harshad number since it is a multiple of its sum of digits (20).

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, 292502 + ... + 299738.

Almost surely, 2^2143020440 is an apocalyptic number.

2143020440 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 2143020440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2634342480).

2143020440 is an abundant number, since it is smaller than the sum of its proper divisors (3125664520).

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

2143020440 is a wasteful number, since it uses less digits than its factorization.

2143020440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7932 (or 7928 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 2143020440 is about 46292.7687657587. The cubic root of 2143020440 is about 1289.2647373420.

Adding to 2143020440 its reverse (440203412), we get a palindrome (2583223852).

The spelling of 2143020440 in words is "two billion, one hundred forty-three million, twenty thousand, four hundred forty".