11572220440 has 128 divisors (see below), whose sum is σ = 28961064000. Its totient is φ = 4126464000.

The previous prime is 11572220431. The next prime is 11572220453. The reversal of 11572220440 is 4402227511.

It is a junction number, because it is equal to n+sod(n) for n = 11572220399 and 11572220408.

It is a congruent number.

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, 4842766 + ... + 4845154.

Almost surely, 2^11572220440 is an apocalyptic number.

11572220440 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 11572220440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14480532000).

11572220440 is an abundant number, since it is smaller than the sum of its proper divisors (17388843560).

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

11572220440 is a wasteful number, since it uses less digits than its factorization.

11572220440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2621 (or 2617 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 28.

Adding to 11572220440 its reverse (4402227511), we get a palindrome (15974447951).

The spelling of 11572220440 in words is "eleven billion, five hundred seventy-two million, two hundred twenty thousand, four hundred forty".