13911240 has 64 divisors (see below), whose sum is σ = 47698560. Its totient is φ = 3179520.

The previous prime is 13911229. The next prime is 13911257. The reversal of 13911240 is 4211931.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7441 + ... + 9120.

It is an arithmetic number, because the mean of its divisors is an integer number (745290).

Almost surely, 2^13911240 is an apocalyptic number.

13911240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13911240 is an abundant number, since it is smaller than the sum of its proper divisors (33787320).

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

13911240 is a wasteful number, since it uses less digits than its factorization.

13911240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16582 (or 16578 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 13911240 is about 3729.7774732549. Note that the first 3 decimals coincide. The cubic root of 13911240 is about 240.5038027992.

The spelling of 13911240 in words is "thirteen million, nine hundred eleven thousand, two hundred forty".