404040024 has 96 divisors (see below), whose sum is σ = 1120392000. Its totient is φ = 131499456.

The previous prime is 404040023. The next prime is 404040029. The reversal of 404040024 is 420040404.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 404039979 and 404040006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404040023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 964087 + ... + 964505.

It is an arithmetic number, because the mean of its divisors is an integer number (11670750).

Almost surely, 2^404040024 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 404040024, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (560196000).

404040024 is an abundant number, since it is smaller than the sum of its proper divisors (716351976).

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

404040024 is a wasteful number, since it uses less digits than its factorization.

404040024 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 717 (or 710 counting only the distinct ones).

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

The square root of 404040024 is about 20100.7468517963. The cubic root of 404040024 is about 739.2785908316.

Adding to 404040024 its reverse (420040404), we get a palindrome (824080428).

The spelling of 404040024 in words is "four hundred four million, forty thousand, twenty-four".