404138 has 8 divisors (see below), whose sum is σ = 692832. Its totient is φ = 173196.

The previous prime is 404123. The next prime is 404161. The reversal of 404138 is 831404.

404138 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

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, 14420 + ... + 14447.

It is an arithmetic number, because the mean of its divisors is an integer number (86604).

2⁴⁰⁴¹³⁸ is an apocalyptic number.

404138 is a deficient number, since it is larger than the sum of its proper divisors (288694).

404138 is a wasteful number, since it uses less digits than its factorization.

404138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28876.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 404138 is about 635.7184911578. The cubic root of 404138 is about 73.9338342095.

The spelling of 404138 in words is "four hundred four thousand, one hundred thirty-eight".