13685418 has 12 divisors (see below), whose sum is σ = 29651778. Its totient is φ = 4561800.

The previous prime is 13685417. The next prime is 13685423. The reversal of 13685418 is 81458631.

It can be written as a sum of positive squares in only one way, i.e., 9753129 + 3932289 = 3123^2 + 1983^2 .

It is not an unprimeable number, because it can be changed into a prime (13685417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 380133 + ... + 380168.

Almost surely, 2^13685418 is an apocalyptic number.

13685418 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

13685418 is an abundant number, since it is smaller than the sum of its proper divisors (15966360).

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

13685418 is a wasteful number, since it uses less digits than its factorization.

13685418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 760309 (or 760306 counting only the distinct ones).

The product of its digits is 23040, while the sum is 36.

The square root of 13685418 is about 3699.3807589920. The cubic root of 13685418 is about 239.1953259304.

It can be divided in two parts, 1368 and 5418, that added together give a triangular number (6786 = T₁₁₆).

The spelling of 13685418 in words is "thirteen million, six hundred eighty-five thousand, four hundred eighteen".