404342440 has 32 divisors (see below), whose sum is σ = 913079880. Its totient is φ = 161148672.

The previous prime is 404342429. The next prime is 404342441. The reversal of 404342440 is 44243404.

It can be written as a sum of positive squares in 4 ways, for example, as 139759684 + 264582756 = 11822^2 + 16266^2 .

It is not an unprimeable number, because it can be changed into a prime (404342441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7167 + ... + 29326.

Almost surely, 2^404342440 is an apocalyptic number.

404342440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

404342440 is an abundant number, since it is smaller than the sum of its proper divisors (508737440).

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

404342440 is a wasteful number, since it uses less digits than its factorization.

404342440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36781 (or 36777 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 25.

The square root of 404342440 is about 20108.2679512682. The cubic root of 404342440 is about 739.4629899877.

Adding to 404342440 its reverse (44243404), we get a palindrome (448585844).

The spelling of 404342440 in words is "four hundred four million, three hundred forty-two thousand, four hundred forty".