404542400 has 84 divisors (see below), whose sum is σ = 1038801072. Its totient is φ = 154767360.

The previous prime is 404542399. The next prime is 404542417. The reversal of 404542400 is 4245404.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 31304 + ... + 42296.

Almost surely, 2^404542400 is an apocalyptic number.

404542400 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 404542400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (519400536).

404542400 is an abundant number, since it is smaller than the sum of its proper divisors (634258672).

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

404542400 is a wasteful number, since it uses less digits than its factorization.

404542400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11038 (or 11023 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 23.

The square root of 404542400 is about 20113.2394208392. The cubic root of 404542400 is about 739.5848657686.

Adding to 404542400 its reverse (4245404), we get a palindrome (408787804).

The spelling of 404542400 in words is "four hundred four million, five hundred forty-two thousand, four hundred".