404231004 has 72 divisors (see below), whose sum is σ = 1079791440. Its totient is φ = 127153152.

The previous prime is 404230991. The next prime is 404231017. The reversal of 404231004 is 400132404.

It is an interprime number because it is at equal distance from previous prime (404230991) and next prime (404231017).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 199404 + ... + 201420.

Almost surely, 2^404231004 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 404231004, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (539895720).

404231004 is an abundant number, since it is smaller than the sum of its proper divisors (675560436).

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

404231004 is a wasteful number, since it uses less digits than its factorization.

404231004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2339 (or 2334 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 404231004 is about 20105.4968603116. The cubic root of 404231004 is about 739.3950522195.

Adding to 404231004 its reverse (400132404), we get a palindrome (804363408).

The spelling of 404231004 in words is "four hundred four million, two hundred thirty-one thousand, four".