404204400 has 90 divisors (see below), whose sum is σ = 1402714040. Its totient is φ = 107786880.

The previous prime is 404204399. The next prime is 404204401. The reversal of 404204400 is 4402404.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (404204399) and next prime (404204401).

It is a tau number, because it is divible by the number of its divisors (90).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404204401) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 52540 + ... + 59739.

Almost surely, 2^404204400 is an apocalyptic number.

404204400 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

404204400 is an abundant number, since it is smaller than the sum of its proper divisors (998509640).

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

404204400 is a wasteful number, since it uses less digits than its factorization.

404204400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112303 (or 112289 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 18.

The square root of 404204400 is about 20104.8352393149. The cubic root of 404204400 is about 739.3788310511.

Adding to 404204400 its reverse (4402404), we get a palindrome (408606804).

The spelling of 404204400 in words is "four hundred four million, two hundred four thousand, four hundred".