13851438 has 8 divisors (see below), whose sum is σ = 27702888. Its totient is φ = 4617144.

The previous prime is 13851433. The next prime is 13851457. The reversal of 13851438 is 83415831.

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

13851438 is an admirable number.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 13851399 and 13851408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13851433) 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, 1154281 + ... + 1154292.

It is an arithmetic number, because the mean of its divisors is an integer number (3462861).

Almost surely, 2^13851438 is an apocalyptic number.

13851438 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.

13851438 is a wasteful number, since it uses less digits than its factorization.

13851438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2308578.

The product of its digits is 11520, while the sum is 33.

The square root of 13851438 is about 3721.7520067839. The cubic root of 13851438 is about 240.1586797855.

The spelling of 13851438 in words is "thirteen million, eight hundred fifty-one thousand, four hundred thirty-eight".