404238 has 16 divisors (see below), whose sum is σ = 818640. Its totient is φ = 133056.

The previous prime is 404221. The next prime is 404249. The reversal of 404238 is 832404.

It is a happy number.

It is a plaindrome in base 11.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 156 + ... + 912.

It is an arithmetic number, because the mean of its divisors is an integer number (51165).

2⁴⁰⁴²³⁸ is an apocalyptic number.

404238 is an abundant number, since it is smaller than the sum of its proper divisors (414402).

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

404238 is a wasteful number, since it uses less digits than its factorization.

404238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 851.

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 404238 is about 635.7971374582. The cubic root of 404238 is about 73.9399317749.

It can be divided in two parts, 40 and 4238, that added together give a triangular number (4278 = T₉₂).

The spelling of 404238 in words is "four hundred four thousand, two hundred thirty-eight".