11391380 has 96 divisors (see below), whose sum is σ = 32175360. Its totient is φ = 3271680.

The previous prime is 11391361. The next prime is 11391383. The reversal of 11391380 is 8319311.

11391380 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11391383) 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, 19736 + ... + 20304.

It is an arithmetic number, because the mean of its divisors is an integer number (335160).

Almost surely, 2^11391380 is an apocalyptic number.

11391380 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 11391380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16087680).

11391380 is an abundant number, since it is smaller than the sum of its proper divisors (20783980).

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

11391380 is a wasteful number, since it uses less digits than its factorization.

11391380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 609 (or 607 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 26.

The square root of 11391380 is about 3375.1118499985. Note that the first 3 decimals coincide. The cubic root of 11391380 is about 225.0049710836.

The spelling of 11391380 in words is "eleven million, three hundred ninety-one thousand, three hundred eighty".