13720872 has 32 divisors (see below), whose sum is σ = 37421280. Its totient is φ = 4157760.

The previous prime is 13720871. The next prime is 13720877. The reversal of 13720872 is 27802731.

It is not an unprimeable number, because it can be changed into a prime (13720871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25723 + ... + 26250.

It is an arithmetic number, because the mean of its divisors is an integer number (1169415).

Almost surely, 2^13720872 is an apocalyptic number.

13720872 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

13720872 is an abundant number, since it is smaller than the sum of its proper divisors (23700408).

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

13720872 is a wasteful number, since it uses less digits than its factorization.

13720872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51993 (or 51989 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 30.

The square root of 13720872 is about 3704.1695425561. The cubic root of 13720872 is about 239.4017041927.

The spelling of 13720872 in words is "thirteen million, seven hundred twenty thousand, eight hundred seventy-two".