1838406 has 16 divisors (see below), whose sum is σ = 3691584. Its totient is φ = 610344.

The previous prime is 1838401. The next prime is 1838407. The reversal of 1838406 is 6048381.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1838401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1641 + ... + 2523.

It is an arithmetic number, because the mean of its divisors is an integer number (230724).

2^1838406 is an apocalyptic number.

1838406 is an abundant number, since it is smaller than the sum of its proper divisors (1853178).

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

1838406 is a wasteful number, since it uses less digits than its factorization.

1838406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1235.

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 1838406 is about 1355.8783131240. The cubic root of 1838406 is about 122.5031180659.

The spelling of 1838406 in words is "one million, eight hundred thirty-eight thousand, four hundred six".