13943856 has 20 divisors (see below), whose sum is σ = 36021752. Its totient is φ = 4647936.

The previous prime is 13943849. The next prime is 13943863. The reversal of 13943856 is 65834931.

It is an interprime number because it is at equal distance from previous prime (13943849) and next prime (13943863).

It is a super-3 number, since 3×13943856³ (a number of 22 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 145201 + ... + 145296.

Almost surely, 2^13943856 is an apocalyptic number.

13943856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

13943856 is an abundant number, since it is smaller than the sum of its proper divisors (22077896).

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

13943856 is a wasteful number, since it uses less digits than its factorization.

13943856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290508 (or 290502 counting only the distinct ones).

The product of its digits is 77760, while the sum is 39.

The square root of 13943856 is about 3734.1472922208. The cubic root of 13943856 is about 240.6916161429.

The spelling of 13943856 in words is "thirteen million, nine hundred forty-three thousand, eight hundred fifty-six".