13878256 has 80 divisors (see below), whose sum is σ = 33587136. Its totient is φ = 5419008.

The previous prime is 13878229. The next prime is 13878281. The reversal of 13878256 is 65287831.

It is a congruent number.

It is an unprimeable number.

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, 70350 + ... + 70546.

Almost surely, 2^13878256 is an apocalyptic number.

13878256 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 13878256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16793568).

13878256 is an abundant number, since it is smaller than the sum of its proper divisors (19708880).

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

13878256 is a wasteful number, since it uses less digits than its factorization.

13878256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266 (or 260 counting only the distinct ones).

The product of its digits is 80640, while the sum is 40.

The square root of 13878256 is about 3725.3531376233. The cubic root of 13878256 is about 240.3135716066.

It can be divided in two parts, 1387825 and 6, that added together give a palindrome (1387831).

The spelling of 13878256 in words is "thirteen million, eight hundred seventy-eight thousand, two hundred fifty-six".