11231280 has 120 divisors (see below), whose sum is σ = 39751920. Its totient is φ = 2833920.

The previous prime is 11231267. The next prime is 11231293. The reversal of 11231280 is 8213211.

It is an interprime number because it is at equal distance from previous prime (11231267) and next prime (11231293).

It is a tau number, because it is divible by the number of its divisors (120).

It is a super-2 number, since 2×11231280² = 252283300876800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13270 + ... + 14090.

It is an arithmetic number, because the mean of its divisors is an integer number (331266).

Almost surely, 2^11231280 is an apocalyptic number.

11231280 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 11231280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19875960).

11231280 is an abundant number, since it is smaller than the sum of its proper divisors (28520640).

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

11231280 is a wasteful number, since it uses less digits than its factorization.

11231280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 859 (or 850 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

The square root of 11231280 is about 3351.3101915520. The cubic root of 11231280 is about 223.9458840361.

Adding to 11231280 its reverse (8213211), we get a palindrome (19444491).

It can be divided in two parts, 11231 and 280, that added together give a palindrome (11511).

The spelling of 11231280 in words is "eleven million, two hundred thirty-one thousand, two hundred eighty".