11717940 has 96 divisors (see below), whose sum is σ = 35957376. Its totient is φ = 2833920.

The previous prime is 11717933. The next prime is 11717941. The reversal of 11717940 is 4971711.

11717940 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 (30).

It is a junction number, because it is equal to n+sod(n) for n = 11717898 and 11717907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11717941) 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, 64650 + ... + 64830.

It is an arithmetic number, because the mean of its divisors is an integer number (374556).

Almost surely, 2^11717940 is an apocalyptic number.

11717940 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 11717940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17978688).

11717940 is an abundant number, since it is smaller than the sum of its proper divisors (24239436).

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

11717940 is a wasteful number, since it uses less digits than its factorization.

11717940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289 (or 287 counting only the distinct ones).

The product of its (nonzero) digits is 1764, while the sum is 30.

The square root of 11717940 is about 3423.1476742904. The cubic root of 11717940 is about 227.1348406761.

The spelling of 11717940 in words is "eleven million, seven hundred seventeen thousand, nine hundred forty".