404000440 has 16 divisors (see below), whose sum is σ = 909001080. Its totient is φ = 161600160.

The previous prime is 404000423. The next prime is 404000449. The reversal of 404000440 is 44000404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404000449) 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, 5049966 + ... + 5050045.

Almost surely, 2^404000440 is an apocalyptic number.

404000440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

404000440 is an abundant number, since it is smaller than the sum of its proper divisors (505000640).

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

404000440 is a wasteful number, since it uses less digits than its factorization.

404000440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10100022 (or 10100018 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 16.

The square root of 404000440 is about 20099.7621876479. The cubic root of 404000440 is about 739.2544475474.

Adding to 404000440 its reverse (44000404), we get a palindrome (448000844).

The spelling of 404000440 in words is "four hundred four million, four hundred forty", and thus it is an aban number.