404445400 has 48 divisors (see below), whose sum is σ = 989836200. Its totient is φ = 153262080.

The previous prime is 404445383. The next prime is 404445403. The reversal of 404445400 is 4544404.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404445403) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 49417 + ... + 57016.

Almost surely, 2^404445400 is an apocalyptic number.

404445400 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

404445400 is an abundant number, since it is smaller than the sum of its proper divisors (585390800).

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

404445400 is a wasteful number, since it uses less digits than its factorization.

404445400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106468 (or 106459 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 25.

The square root of 404445400 is about 20110.8279292524. The cubic root of 404445400 is about 739.5257492074.

Adding to 404445400 its reverse (4544404), we get a palindrome (408989804).

The spelling of 404445400 in words is "four hundred four million, four hundred forty-five thousand, four hundred".