11331380 has 24 divisors (see below), whose sum is σ = 23866920. Its totient is φ = 4519040.

The previous prime is 11331379. The next prime is 11331389. The reversal of 11331380 is 8313311.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 3254416 + 8076964 = 1804^2 + 2842^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11331389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8606 + ... + 9834.

It is an arithmetic number, because the mean of its divisors is an integer number (994455).

Almost surely, 2^11331380 is an apocalyptic number.

11331380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11331380 is an abundant number, since it is smaller than the sum of its proper divisors (12535540).

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

11331380 is a wasteful number, since it uses less digits than its factorization.

11331380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1699 (or 1697 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 11331380 is about 3366.2115203891. The cubic root of 11331380 is about 224.6092311901.

Adding to 11331380 its reverse (8313311), we get a palindrome (19644691).

It can be divided in two parts, 11331 and 380, that added together give a palindrome (11711).

The spelling of 11331380 in words is "eleven million, three hundred thirty-one thousand, three hundred eighty".