11081280 has 224 divisors, whose sum is σ = 43013376. Its totient is φ = 2359296.

The previous prime is 11081269. The next prime is 11081281. The reversal of 11081280 is 8218011.

It is a tau number, because it is divible by the number of its divisors (224).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (11081281) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 114192 + ... + 114288.

It is an arithmetic number, because the mean of its divisors is an integer number (192024).

Almost surely, 2^11081280 is an apocalyptic number.

11081280 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 11081280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21506688).

11081280 is an abundant number, since it is smaller than the sum of its proper divisors (31932096).

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

11081280 is a wasteful number, since it uses less digits than its factorization.

11081280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141 (or 131 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 21.

The square root of 11081280 is about 3328.8556592319. The cubic root of 11081280 is about 222.9444384223.

Adding to 11081280 its reverse (8218011), we get a palindrome (19299291).

The spelling of 11081280 in words is "eleven million, eighty-one thousand, two hundred eighty".