11881340 has 36 divisors (see below), whose sum is σ = 26106024. Its totient is φ = 4541856.

The previous prime is 11881333. The next prime is 11881343. The reversal of 11881340 is 4318811.

It is a Smith number, since the sum of its digits (26) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11881343) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10019 + ... + 11141.

Almost surely, 2^11881340 is an apocalyptic number.

11881340 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 11881340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13053012).

11881340 is an abundant number, since it is smaller than the sum of its proper divisors (14224684).

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

11881340 is a wasteful number, since it uses less digits than its factorization.

11881340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1178 (or 1153 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 26.

The square root of 11881340 is about 3446.9319691575. The cubic root of 11881340 is about 228.1857263742.

It can be divided in two parts, 11881 and 340, that added together give a palindrome (12221).

The spelling of 11881340 in words is "eleven million, eight hundred eighty-one thousand, three hundred forty".