2142444440 has 64 divisors (see below), whose sum is σ = 4992269760. Its totient is φ = 826974720.

The previous prime is 2142444439. The next prime is 2142444449. The reversal of 2142444440 is 444442412.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2142444449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 121037 + ... + 137603.

It is an arithmetic number, because the mean of its divisors is an integer number (78004215).

Almost surely, 2^2142444440 is an apocalyptic number.

2142444440 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 2142444440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2496134880).

2142444440 is an abundant number, since it is smaller than the sum of its proper divisors (2849825320).

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

2142444440 is a wasteful number, since it uses less digits than its factorization.

2142444440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16692 (or 16688 counting only the distinct ones).

The product of its (nonzero) digits is 16384, while the sum is 29.

The square root of 2142444440 is about 46286.5470736368. The cubic root of 2142444440 is about 1289.1492176735.

Adding to 2142444440 its reverse (444442412), we get a palindrome (2586886852).

The spelling of 2142444440 in words is "two billion, one hundred forty-two million, four hundred forty-four thousand, four hundred forty".