11805040 has 40 divisors (see below), whose sum is σ = 29560608. Its totient is φ = 4358400.

The previous prime is 11805019. The next prime is 11805047. The reversal of 11805040 is 4050811.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 11804999 and 11805017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11805047) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4636 + ... + 6715.

Almost surely, 2^11805040 is an apocalyptic number.

11805040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11805040 is an abundant number, since it is smaller than the sum of its proper divisors (17755568).

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

11805040 is a wasteful number, since it uses less digits than its factorization.

11805040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11377 (or 11371 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 19.

The square root of 11805040 is about 3435.8463295089. The cubic root of 11805040 is about 227.6962200354.

Adding to 11805040 its reverse (4050811), we get a palindrome (15855851).

The spelling of 11805040 in words is "eleven million, eight hundred five thousand, forty".