404323040 has 192 divisors, whose sum is σ = 1116944640. Its totient is φ = 136765440.

The previous prime is 404323037. The next prime is 404323069. The reversal of 404323040 is 40323404.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3578024 + ... + 3578136.

It is an arithmetic number, because the mean of its divisors is an integer number (5817420).

Almost surely, 2^404323040 is an apocalyptic number.

404323040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 404323040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (558472320).

404323040 is an abundant number, since it is smaller than the sum of its proper divisors (712621600).

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

404323040 is a wasteful number, since it uses less digits than its factorization.

404323040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265 (or 257 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 20.

The square root of 404323040 is about 20107.7855568434. The cubic root of 404323040 is about 739.4511635340.

Adding to 404323040 its reverse (40323404), we get a palindrome (444646444).

The spelling of 404323040 in words is "four hundred four million, three hundred twenty-three thousand, forty".