1113031440 has 240 divisors, whose sum is σ = 3944318976. Its totient is φ = 280857600.

The previous prime is 1113031427. The next prime is 1113031481. The reversal of 1113031440 is 441303111.

It is a tau number, because it is divible by the number of its divisors (240).

It is a Harshad number since it is a multiple of its sum of digits (18).

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 47 ways as a sum of consecutive naturals, for example, 1048510 + ... + 1049570.

Almost surely, 2^1113031440 is an apocalyptic number.

1113031440 is a gapful number since it is divisible by the number (10) 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 1113031440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1972159488).

1113031440 is an abundant number, since it is smaller than the sum of its proper divisors (2831287536).

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

1113031440 is a wasteful number, since it uses less digits than its factorization.

1113031440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1158 (or 1149 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 1113031440 is about 33362.1258315474. The cubic root of 1113031440 is about 1036.3405160627.

Adding to 1113031440 its reverse (441303111), we get a palindrome (1554334551).

The spelling of 1113031440 in words is "one billion, one hundred thirteen million, thirty-one thousand, four hundred forty".