404025424 has 60 divisors (see below), whose sum is σ = 901415520. Its totient is φ = 173954880.

The previous prime is 404025409. The next prime is 404025469. The reversal of 404025424 is 424520404.

It is a happy number.

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, 60357 + ... + 66715.

It is an arithmetic number, because the mean of its divisors is an integer number (15023592).

Almost surely, 2^404025424 is an apocalyptic number.

404025424 is a gapful number since it is divisible by the number (44) 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 404025424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (450707760).

404025424 is an abundant number, since it is smaller than the sum of its proper divisors (497390096).

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

404025424 is a wasteful number, since it uses less digits than its factorization.

404025424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6416 (or 6391 counting only the distinct ones).

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

The square root of 404025424 is about 20100.3836779301. The cubic root of 404025424 is about 739.2696861054.

Adding to 404025424 its reverse (424520404), we get a palindrome (828545828).

The spelling of 404025424 in words is "four hundred four million, twenty-five thousand, four hundred twenty-four".