838406 has 8 divisors (see below), whose sum is σ = 1331640. Its totient is φ = 394528.

The previous prime is 838403. The next prime is 838421. The reversal of 838406 is 604838.

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

It is a Curzon number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 838406.

It is not an unprimeable number, because it can be changed into a prime (838403) 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, 12296 + ... + 12363.

It is an arithmetic number, because the mean of its divisors is an integer number (166455).

2⁸³⁸⁴⁰⁶ is an apocalyptic number.

838406 is a deficient number, since it is larger than the sum of its proper divisors (493234).

838406 is a wasteful number, since it uses less digits than its factorization.

838406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24678.

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 838406 is about 915.6451277651. The cubic root of 838406 is about 94.2941592418.

The spelling of 838406 in words is "eight hundred thirty-eight thousand, four hundred six".