11913040 has 20 divisors (see below), whose sum is σ = 27698004. Its totient is φ = 4765184.

The previous prime is 11913023. The next prime is 11913047. The reversal of 11913040 is 4031911.

It is a happy number.

11913040 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 3779136 + 8133904 = 1944^2 + 2852^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 11912999 and 11913017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11913047) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74377 + ... + 74536.

Almost surely, 2^11913040 is an apocalyptic number.

11913040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11913040 is an abundant number, since it is smaller than the sum of its proper divisors (15784964).

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

11913040 is a wasteful number, since it uses less digits than its factorization.

11913040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148926 (or 148920 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 19.

The square root of 11913040 is about 3451.5271982124. The cubic root of 11913040 is about 228.3884830762.

Adding to 11913040 its reverse (4031911), we get a palindrome (15944951).

The spelling of 11913040 in words is "eleven million, nine hundred thirteen thousand, forty".