13911540 has 24 divisors (see below), whose sum is σ = 38952480. Its totient is φ = 3709728.

The previous prime is 13911539. The next prime is 13911571. The reversal of 13911540 is 4511931.

13911540 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 13911540.

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, 115870 + ... + 115989.

It is an arithmetic number, because the mean of its divisors is an integer number (1623020).

Almost surely, 2^13911540 is an apocalyptic number.

13911540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13911540 is an abundant number, since it is smaller than the sum of its proper divisors (25040940).

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

13911540 is a wasteful number, since it uses less digits than its factorization.

13911540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231871 (or 231869 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 24.

The square root of 13911540 is about 3729.8176899146. The cubic root of 13911540 is about 240.5055316319.

The spelling of 13911540 in words is "thirteen million, nine hundred eleven thousand, five hundred forty".