11144720 has 20 divisors (see below), whose sum is σ = 25911660. Its totient is φ = 4457856.

The previous prime is 11144699. The next prime is 11144723. The reversal of 11144720 is 2744111.

It can be written as a sum of positive squares in 2 ways, for example, as 6801664 + 4343056 = 2608^2 + 2084^2 .

It is a tau number, because it is divible by the number of its divisors (20).

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

It is a junction number, because it is equal to n+sod(n) for n = 11144692 and 11144701.

It is not an unprimeable number, because it can be changed into a prime (11144723) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69575 + ... + 69734.

It is an arithmetic number, because the mean of its divisors is an integer number (1295583).

Almost surely, 2^11144720 is an apocalyptic number.

11144720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11144720 is an abundant number, since it is smaller than the sum of its proper divisors (14766940).

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

11144720 is a wasteful number, since it uses less digits than its factorization.

11144720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139322 (or 139316 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 20.

The square root of 11144720 is about 3338.3708601652. The cubic root of 11144720 is about 223.3690792020.

Adding to 11144720 its reverse (2744111), we get a palindrome (13888831).

The spelling of 11144720 in words is "eleven million, one hundred forty-four thousand, seven hundred twenty".