1013444440 has 32 divisors (see below), whose sum is σ = 2358882000. Its totient is φ = 391398784.

The previous prime is 1013444407. The next prime is 1013444441. The reversal of 1013444440 is 444443101.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1013444441) 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 7 ways as a sum of consecutive naturals, for example, 435670 + ... + 437989.

Almost surely, 2^1013444440 is an apocalyptic number.

1013444440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1013444440 is an abundant number, since it is smaller than the sum of its proper divisors (1345437560).

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

1013444440 is a wasteful number, since it uses less digits than its factorization.

1013444440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 873699 (or 873695 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 25.

The square root of 1013444440 is about 31834.6421371436. The cubic root of 1013444440 is about 1004.4615450132.

Adding to 1013444440 its reverse (444443101), we get a palindrome (1457887541).

The spelling of 1013444440 in words is "one billion, thirteen million, four hundred forty-four thousand, four hundred forty".