11720040 has 64 divisors (see below), whose sum is σ = 35544960. Its totient is φ = 3091200.

The previous prime is 11720039. The next prime is 11720047. The reversal of 11720040 is 4002711.

11720040 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 (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11720047) 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, 11637 + ... + 12603.

It is an arithmetic number, because the mean of its divisors is an integer number (555390).

Almost surely, 2^11720040 is an apocalyptic number.

11720040 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 11720040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17772480).

11720040 is an abundant number, since it is smaller than the sum of its proper divisors (23824920).

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

11720040 is a wasteful number, since it uses less digits than its factorization.

11720040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1082 (or 1078 counting only the distinct ones).

The product of its (nonzero) digits is 56, while the sum is 15.

The square root of 11720040 is about 3423.4543957821. The cubic root of 11720040 is about 227.1484083247.

Adding to 11720040 its reverse (4002711), we get a palindrome (15722751).

The spelling of 11720040 in words is "eleven million, seven hundred twenty thousand, forty".