11771320 has 64 divisors (see below), whose sum is σ = 29859840. Its totient is φ = 4137600.

The previous prime is 11771311. The next prime is 11771321. The reversal of 11771320 is 2317711.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 11771291 and 11771300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11771321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13209 + ... + 14071.

It is an arithmetic number, because the mean of its divisors is an integer number (466560).

Almost surely, 2^11771320 is an apocalyptic number.

11771320 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 11771320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14929920).

11771320 is an abundant number, since it is smaller than the sum of its proper divisors (18088520).

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

11771320 is a wasteful number, since it uses less digits than its factorization.

11771320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 916 (or 912 counting only the distinct ones).

The product of its (nonzero) digits is 294, while the sum is 22.

The square root of 11771320 is about 3430.9357324205. The cubic root of 11771320 is about 227.4792155870.

The spelling of 11771320 in words is "eleven million, seven hundred seventy-one thousand, three hundred twenty".