2113444440 has 128 divisors (see below), whose sum is σ = 7235352000. Its totient is φ = 548342784.

The previous prime is 2113444429. The next prime is 2113444451. The reversal of 2113444440 is 444443112.

2113444440 is a `hidden beast` number, since 211 + 3 + 4 + 4 + 4 + 440 = 666.

It is an interprime number because it is at equal distance from previous prime (2113444429) and next prime (2113444451).

It is a super-3 number, since 3×2113444440³ (a number of 29 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13516 + ... + 66404.

Almost surely, 2^2113444440 is an apocalyptic number.

2113444440 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 2113444440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3617676000).

2113444440 is an abundant number, since it is smaller than the sum of its proper divisors (5121907560).

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

2113444440 is a wasteful number, since it uses less digits than its factorization.

2113444440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52946 (or 52936 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 27.

The square root of 2113444440 is about 45972.2137818052. The cubic root of 2113444440 is about 1283.3061584546.

Adding to 2113444440 its reverse (444443112), we get a palindrome (2557887552).

The spelling of 2113444440 in words is "two billion, one hundred thirteen million, four hundred forty-four thousand, four hundred forty".