1103143440 has 160 divisors (see below), whose sum is σ = 3924320256. Its totient is φ = 251112960.

The previous prime is 1103143429. The next prime is 1103143453. The reversal of 1103143440 is 443413011.

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

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, 454069 + ... + 456491.

Almost surely, 2^1103143440 is an apocalyptic number.

1103143440 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 1103143440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1962160128).

1103143440 is an abundant number, since it is smaller than the sum of its proper divisors (2821176816).

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

1103143440 is a wasteful number, since it uses less digits than its factorization.

1103143440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2717 (or 2711 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 1103143440 is about 33213.6032372280. The cubic root of 1103143440 is about 1033.2624865290.

Adding to 1103143440 its reverse (443413011), we get a palindrome (1546556451).

The spelling of 1103143440 in words is "one billion, one hundred three million, one hundred forty-three thousand, four hundred forty".