13912720 has 20 divisors (see below), whose sum is σ = 32347260. Its totient is φ = 5565056.

The previous prime is 13912699. The next prime is 13912727. The reversal of 13912720 is 2721931.

It can be written as a sum of positive squares in 2 ways, for example, as 2298256 + 11614464 = 1516^2 + 3408^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13912727) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86875 + ... + 87034.

It is an arithmetic number, because the mean of its divisors is an integer number (1617363).

Almost surely, 2^13912720 is an apocalyptic number.

13912720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13912720 is an abundant number, since it is smaller than the sum of its proper divisors (18434540).

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

13912720 is a wasteful number, since it uses less digits than its factorization.

13912720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173922 (or 173916 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 25.

The square root of 13912720 is about 3729.9758712356. The cubic root of 13912720 is about 240.5123314663.

The spelling of 13912720 in words is "thirteen million, nine hundred twelve thousand, seven hundred twenty".