1838438 has 8 divisors (see below), whose sum is σ = 3151632. Its totient is φ = 787896.

The previous prime is 1838429. The next prime is 1838453. The reversal of 1838438 is 8348381.

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

It is a junction number, because it is equal to n+sod(n) for n = 1838398 and 1838407.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65645 + ... + 65672.

It is an arithmetic number, because the mean of its divisors is an integer number (393954).

2^1838438 is an apocalyptic number.

1838438 is a deficient number, since it is larger than the sum of its proper divisors (1313194).

1838438 is a wasteful number, since it uses less digits than its factorization.

1838438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131326.

The product of its digits is 18432, while the sum is 35.

The square root of 1838438 is about 1355.8901135417. The cubic root of 1838438 is about 122.5038288405.

Subtracting from 1838438 its sum of digits (35), we obtain a triangular number (1838403 = T₁₉₁₇).

The spelling of 1838438 in words is "one million, eight hundred thirty-eight thousand, four hundred thirty-eight".