1100321440 has 96 divisors (see below), whose sum is σ = 2712213504. Its totient is φ = 421355520.

The previous prime is 1100321423. The next prime is 1100321459. The reversal of 1100321440 is 441230011.

It is a Harshad number since it is a multiple of its sum of digits (16).

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 15 ways as a sum of consecutive naturals, for example, 479977 + ... + 482263.

It is an arithmetic number, because the mean of its divisors is an integer number (28252224).

Almost surely, 2^1100321440 is an apocalyptic number.

1100321440 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 1100321440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1356106752).

1100321440 is an abundant number, since it is smaller than the sum of its proper divisors (1611892064).

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

1100321440 is a wasteful number, since it uses less digits than its factorization.

1100321440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2430 (or 2422 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 1100321440 is about 33171.0934399215. The cubic root of 1100321440 is about 1032.3806560032.

Adding to 1100321440 its reverse (441230011), we get a palindrome (1541551451).

The spelling of 1100321440 in words is "one billion, one hundred million, three hundred twenty-one thousand, four hundred forty".