13556940 has 24 divisors (see below), whose sum is σ = 37959600. Its totient is φ = 3615168.

The previous prime is 13556909. The next prime is 13556947. The reversal of 13556940 is 4965531.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (13556947) 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, 112915 + ... + 113034.

It is an arithmetic number, because the mean of its divisors is an integer number (1581650).

Almost surely, 2^13556940 is an apocalyptic number.

13556940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13556940 is an abundant number, since it is smaller than the sum of its proper divisors (24402660).

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

13556940 is a wasteful number, since it uses less digits than its factorization.

13556940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225961 (or 225959 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 33.

The square root of 13556940 is about 3681.9750134948. The cubic root of 13556940 is about 238.4444534839. Note that the first 4 decimals are identical.

It can be divided in two parts, 135 and 56940, that added together give a palindrome (57075).

The spelling of 13556940 in words is "thirteen million, five hundred fifty-six thousand, nine hundred forty".