13869906 has 8 divisors (see below), whose sum is σ = 27739824. Its totient is φ = 4623300.

The previous prime is 13869899. The next prime is 13869907. The reversal of 13869906 is 60996831.

13869906 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 sphenic number, since it is the product of 3 distinct primes.

13869906 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (13869907) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1155820 + ... + 1155831.

It is an arithmetic number, because the mean of its divisors is an integer number (3467478).

Almost surely, 2^13869906 is an apocalyptic number.

13869906 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

13869906 is a wasteful number, since it uses less digits than its factorization.

13869906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2311656.

The product of its (nonzero) digits is 69984, while the sum is 42.

The square root of 13869906 is about 3724.2322698779. The cubic root of 13869906 is about 240.2653662007.

It can be divided in two parts, 138 and 69906, that multiplied together give a triangular number (9647028 = T₄₃₉₂).

The spelling of 13869906 in words is "thirteen million, eight hundred sixty-nine thousand, nine hundred six".