13281678 has 32 divisors (see below), whose sum is σ = 29963520. Its totient is φ = 4359960.

The previous prime is 13281661. The next prime is 13281689. The reversal of 13281678 is 87618231.

13281678 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

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, 1783 + ... + 5453.

It is an arithmetic number, because the mean of its divisors is an integer number (936360).

Almost surely, 2^13281678 is an apocalyptic number.

13281678 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 13281678, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14981760).

13281678 is an abundant number, since it is smaller than the sum of its proper divisors (16681842).

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

13281678 is a wasteful number, since it uses less digits than its factorization.

13281678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3749 (or 3743 counting only the distinct ones).

The product of its digits is 16128, while the sum is 36.

The square root of 13281678 is about 3644.4036549208. The cubic root of 13281678 is about 236.8196031487.

It can be divided in two parts, 132 and 81678, that added together give a triangular number (81810 = T₄₀₄).

The spelling of 13281678 in words is "thirteen million, two hundred eighty-one thousand, six hundred seventy-eight".