13857678 has 12 divisors (see below), whose sum is σ = 30025008. Its totient is φ = 4619220.

The previous prime is 13857667. The next prime is 13857691. The reversal of 13857678 is 87675831.

13857678 is a `hidden beast` number, since 1 + 3 + 8 + 576 + 78 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 384918 + ... + 384953.

It is an arithmetic number, because the mean of its divisors is an integer number (2502084).

Almost surely, 2^13857678 is an apocalyptic number.

13857678 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

13857678 is an abundant number, since it is smaller than the sum of its proper divisors (16167330).

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

13857678 is a wasteful number, since it uses less digits than its factorization.

13857678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 769879 (or 769876 counting only the distinct ones).

The product of its digits is 282240, while the sum is 45.

The square root of 13857678 is about 3722.5902272477. The cubic root of 13857678 is about 240.1947377789.

It can be divided in two parts, 13857 and 678, that added together give a triangular number (14535 = T₁₇₀).

The spelling of 13857678 in words is "thirteen million, eight hundred fifty-seven thousand, six hundred seventy-eight".