404330240 has 36 divisors (see below), whose sum is σ = 968500344. Its totient is φ = 161731584.

The previous prime is 404330231. The next prime is 404330243. The reversal of 404330240 is 42033404.

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 not an unprimeable number, because it can be changed into a prime (404330243) 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, 156662 + ... + 159221.

Almost surely, 2^404330240 is an apocalyptic number.

404330240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

404330240 is an abundant number, since it is smaller than the sum of its proper divisors (564170104).

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

404330240 is an equidigital number, since it uses as much as digits as its factorization.

404330240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315904 (or 315890 counting only the distinct ones).

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

The square root of 404330240 is about 20107.9645911763. The cubic root of 404330240 is about 739.4555527775.

Adding to 404330240 its reverse (42033404), we get a palindrome (446363644).

The spelling of 404330240 in words is "four hundred four million, three hundred thirty thousand, two hundred forty".