11711720 has 16 divisors (see below), whose sum is σ = 26351460. Its totient is φ = 4684672.

The previous prime is 11711701. The next prime is 11711731. The reversal of 11711720 is 2711711.

11711720 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 9597604 + 2114116 = 3098^2 + 1454^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 11711692 and 11711701.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 146357 + ... + 146436.

Almost surely, 2^11711720 is an apocalyptic number.

11711720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11711720 is an abundant number, since it is smaller than the sum of its proper divisors (14639740).

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

11711720 is a wasteful number, since it uses less digits than its factorization.

11711720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292804 (or 292800 counting only the distinct ones).

The product of its (nonzero) digits is 98, while the sum is 20.

The square root of 11711720 is about 3422.2390331477. The cubic root of 11711720 is about 227.0946450799.

Subtracting from 11711720 its reverse (2711711), we obtain a palindrome (9000009).

The spelling of 11711720 in words is "eleven million, seven hundred eleven thousand, seven hundred twenty".