11033031440 has 80 divisors (see below), whose sum is σ = 27392532480. Its totient is φ = 4123553280.

The previous prime is 11033031421. The next prime is 11033031463. The reversal of 11033031440 is 4413033011.

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, 4784 + ... + 148623.

It is an arithmetic number, because the mean of its divisors is an integer number (342406656).

Almost surely, 2^11033031440 is an apocalyptic number.

11033031440 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 11033031440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13696266240).

11033031440 is an abundant number, since it is smaller than the sum of its proper divisors (16359501040).

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

11033031440 is a wasteful number, since it uses less digits than its factorization.

11033031440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153480 (or 153474 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 11033031440 its reverse (4413033011), we get a palindrome (15446064451).

The spelling of 11033031440 in words is "eleven billion, thirty-three million, thirty-one thousand, four hundred forty".