13686690 has 16 divisors (see below), whose sum is σ = 32848128. Its totient is φ = 3649776.

The previous prime is 13686689. The next prime is 13686713. The reversal of 13686690 is 9668631.

It is a happy number.

13686690 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×13686690² = 374650966312200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 228082 + ... + 228141.

It is an arithmetic number, because the mean of its divisors is an integer number (2053008).

Almost surely, 2^13686690 is an apocalyptic number.

13686690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13686690 is an abundant number, since it is smaller than the sum of its proper divisors (19161438).

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

13686690 is a wasteful number, since it uses less digits than its factorization.

13686690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 456233.

The product of its (nonzero) digits is 46656, while the sum is 39.

The square root of 13686690 is about 3699.5526756623. The cubic root of 13686690 is about 239.2027364221.

The spelling of 13686690 in words is "thirteen million, six hundred eighty-six thousand, six hundred ninety".