11401280 has 112 divisors (see below), whose sum is σ = 30723840. Its totient is φ = 3993600.

The previous prime is 11401279. The next prime is 11401289. The reversal of 11401280 is 8210411.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11401289) by changing a digit.

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, 144281 + ... + 144359.

It is an arithmetic number, because the mean of its divisors is an integer number (274320).

Almost surely, 2^11401280 is an apocalyptic number.

11401280 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 11401280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15361920).

11401280 is an abundant number, since it is smaller than the sum of its proper divisors (19322560).

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

11401280 is a wasteful number, since it uses less digits than its factorization.

11401280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148 (or 138 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

The square root of 11401280 is about 3376.5781495473. The cubic root of 11401280 is about 225.0701345148.

Adding to 11401280 its reverse (8210411), we get a palindrome (19611691).

The spelling of 11401280 in words is "eleven million, four hundred one thousand, two hundred eighty".