1100243440 has 80 divisors (see below), whose sum is σ = 2592021600. Its totient is φ = 434304000.

The previous prime is 1100243437. The next prime is 1100243449. The reversal of 1100243440 is 443420011.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1100243449) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3152386 + ... + 3152734.

It is an arithmetic number, because the mean of its divisors is an integer number (32400270).

Almost surely, 2^1100243440 is an apocalyptic number.

1100243440 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 1100243440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1296010800).

1100243440 is an abundant number, since it is smaller than the sum of its proper divisors (1491778160).

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

1100243440 is a wasteful number, since it uses less digits than its factorization.

1100243440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 770 (or 764 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 1100243440 is about 33169.9176966118. The cubic root of 1100243440 is about 1032.3562608307.

Adding to 1100243440 its reverse (443420011), we get a palindrome (1543663451).

The spelling of 1100243440 in words is "one billion, one hundred million, two hundred forty-three thousand, four hundred forty".