2119939440 has 640 divisors, whose sum is σ = 8099481600. Its totient is φ = 454164480.

The previous prime is 2119939397. The next prime is 2119939441. The reversal of 2119939440 is 449399112.

It is a junction number, because it is equal to n+sod(n) for n = 2119939392 and 2119939401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2119939441) 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 127 ways as a sum of consecutive naturals, for example, 51705820 + ... + 51705860.

It is an arithmetic number, because the mean of its divisors is an integer number (12655440).

Almost surely, 2^2119939440 is an apocalyptic number.

2119939440 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 2119939440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4049740800).

2119939440 is an abundant number, since it is smaller than the sum of its proper divisors (5979542160).

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

2119939440 is a wasteful number, since it uses less digits than its factorization.

2119939440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145 (or 139 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 42.

The square root of 2119939440 is about 46042.8000886132. The cubic root of 2119939440 is about 1284.6194253172.

The spelling of 2119939440 in words is "two billion, one hundred nineteen million, nine hundred thirty-nine thousand, four hundred forty".