1240011444 has 72 divisors (see below), whose sum is σ = 3397373280. Its totient is φ = 350960064.

The previous prime is 1240011427. The next prime is 1240011449. The reversal of 1240011444 is 4441100421.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a nialpdrome in base 14.

It is a self number, because there is not a number n which added to its sum of digits gives 1240011444.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1240011449) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 53062 + ... + 72770.

It is an arithmetic number, because the mean of its divisors is an integer number (47185740).

Almost surely, 2^1240011444 is an apocalyptic number.

1240011444 is a gapful number since it is divisible by the number (14) 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 1240011444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1698686640).

1240011444 is an abundant number, since it is smaller than the sum of its proper divisors (2157361836).

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

1240011444 is a wasteful number, since it uses less digits than its factorization.

1240011444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19837 (or 19828 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 21.

The square root of 1240011444 is about 35213.7962168239. The cubic root of 1240011444 is about 1074.3403760093.

Adding to 1240011444 its reverse (4441100421), we get a palindrome (5681111865).

The spelling of 1240011444 in words is "one billion, two hundred forty million, eleven thousand, four hundred forty-four".