13871956 has 48 divisors (see below), whose sum is σ = 28901376. Its totient is φ = 5703264.

The previous prime is 13871939. The next prime is 13871959. The reversal of 13871956 is 65917831.

13871956 = T₃₂₃ + T₃₂₄ + ... + T₄₈₈.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13871959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 109165 + ... + 109291.

It is an arithmetic number, because the mean of its divisors is an integer number (602112).

Almost surely, 2^13871956 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13871956, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14450688).

13871956 is an abundant number, since it is smaller than the sum of its proper divisors (15029420).

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

13871956 is a wasteful number, since it uses less digits than its factorization.

13871956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268 (or 266 counting only the distinct ones).

The product of its digits is 45360, while the sum is 40.

The square root of 13871956 is about 3724.5074842186. The cubic root of 13871956 is about 240.2772028523.

The spelling of 13871956 in words is "thirteen million, eight hundred seventy-one thousand, nine hundred fifty-six".