1838138 has 8 divisors (see below), whose sum is σ = 2784288. Its totient is φ = 910044.

The previous prime is 1838131. The next prime is 1838141. The reversal of 1838138 is 8318381.

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

It is not an unprimeable number, because it can be changed into a prime (1838131) 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, 4256 + ... + 4667.

It is an arithmetic number, because the mean of its divisors is an integer number (348036).

2^1838138 is an apocalyptic number.

1838138 is a deficient number, since it is larger than the sum of its proper divisors (946150).

1838138 is a wasteful number, since it uses less digits than its factorization.

1838138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9028.

The product of its digits is 4608, while the sum is 32.

The square root of 1838138 is about 1355.7794805941. The cubic root of 1838138 is about 122.4971650045.

The spelling of 1838138 in words is "one million, eight hundred thirty-eight thousand, one hundred thirty-eight".