13812040 has 32 divisors (see below), whose sum is σ = 33903360. Its totient is φ = 5022400.

The previous prime is 13812037. The next prime is 13812059. The reversal of 13812040 is 4021831.

It is a junction number, because it is equal to n+sod(n) for n = 13811999 and 13812017.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15256 + ... + 16135.

It is an arithmetic number, because the mean of its divisors is an integer number (1059480).

Almost surely, 2^13812040 is an apocalyptic number.

13812040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13812040 is an abundant number, since it is smaller than the sum of its proper divisors (20091320).

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

13812040 is a wasteful number, since it uses less digits than its factorization.

13812040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31413 (or 31409 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 13812040 is about 3716.4553004173. The cubic root of 13812040 is about 239.9307670673.

Adding to 13812040 its reverse (4021831), we get a palindrome (17833871).

The spelling of 13812040 in words is "thirteen million, eight hundred twelve thousand, forty".