13143856 has 80 divisors (see below), whose sum is σ = 30855168. Its totient is φ = 5350400.

The previous prime is 13143847. The next prime is 13143881. The reversal of 13143856 is 65834131.

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, 68721 + ... + 68911.

Almost surely, 2^13143856 is an apocalyptic number.

13143856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13143856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15427584).

13143856 is an abundant number, since it is smaller than the sum of its proper divisors (17711312).

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

13143856 is a wasteful number, since it uses less digits than its factorization.

13143856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250 (or 244 counting only the distinct ones).

The product of its digits is 8640, while the sum is 31.

The square root of 13143856 is about 3625.4456277815. The cubic root of 13143856 is about 235.9976060276.

Adding to 13143856 its reverse (65834131), we get a palindrome (78977987).

The spelling of 13143856 in words is "thirteen million, one hundred forty-three thousand, eight hundred fifty-six".