2115043440 has 160 divisors (see below), whose sum is σ = 7074029376. Its totient is φ = 520765440.

The previous prime is 2115043429. The next prime is 2115043459. The reversal of 2115043440 is 443405112.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 2115043440.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 211350 + ... + 221130.

Almost surely, 2^2115043440 is an apocalyptic number.

2115043440 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 2115043440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3537014688).

2115043440 is an abundant number, since it is smaller than the sum of its proper divisors (4958985936).

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

2115043440 is a wasteful number, since it uses less digits than its factorization.

2115043440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9867 (or 9861 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 2115043440 is about 45989.6014333675. The cubic root of 2115043440 is about 1283.6297201911.

Adding to 2115043440 its reverse (443405112), we get a palindrome (2558448552).

The spelling of 2115043440 in words is "two billion, one hundred fifteen million, forty-three thousand, four hundred forty".