1103144240 has 80 divisors (see below), whose sum is σ = 2845532160. Its totient is φ = 394325760.

The previous prime is 1103144227. The next prime is 1103144257. The reversal of 1103144240 is 424413011.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41297 + ... + 62543.

It is an arithmetic number, because the mean of its divisors is an integer number (35569152).

Almost surely, 2^1103144240 is an apocalyptic number.

1103144240 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 1103144240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1422766080).

1103144240 is an abundant number, since it is smaller than the sum of its proper divisors (1742387920).

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

1103144240 is a wasteful number, since it uses less digits than its factorization.

1103144240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21330 (or 21324 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 1103144240 is about 33213.6152804840. The cubic root of 1103144240 is about 1033.2627363031.

Adding to 1103144240 its reverse (424413011), we get a palindrome (1527557251).

The spelling of 1103144240 in words is "one billion, one hundred three million, one hundred forty-four thousand, two hundred forty".