404442440 has 16 divisors (see below), whose sum is σ = 909995580. Its totient is φ = 161776960.

The previous prime is 404442421. The next prime is 404442469. The reversal of 404442440 is 44244404.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 398321764 + 6120676 = 19958^2 + 2474^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5055491 + ... + 5055570.

Almost surely, 2^404442440 is an apocalyptic number.

404442440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

404442440 is an abundant number, since it is smaller than the sum of its proper divisors (505553140).

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

404442440 is a wasteful number, since it uses less digits than its factorization.

404442440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10111072 (or 10111068 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 26.

The square root of 404442440 is about 20110.7543369213. The cubic root of 404442440 is about 739.5239450895.

Adding to 404442440 its reverse (44244404), we get a palindrome (448686844).

The spelling of 404442440 in words is "four hundred four million, four hundred forty-two thousand, four hundred forty".