404240031200 has 144 divisors (see below), whose sum is σ = 1008309526560. Its totient is φ = 158197278720.

The previous prime is 404240031193. The next prime is 404240031241. The reversal of 404240031200 is 2130042404.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15208322 + ... + 15234878.

It is an arithmetic number, because the mean of its divisors is an integer number (7002149490).

Almost surely, 2^404240031200 is an apocalyptic number.

404240031200 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 404240031200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (504154763280).

404240031200 is an abundant number, since it is smaller than the sum of its proper divisors (604069495360).

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

404240031200 is a wasteful number, since it uses less digits than its factorization.

404240031200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26989 (or 26976 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

Adding to 404240031200 its reverse (2130042404), we get a palindrome (406370073604).

The spelling of 404240031200 in words is "four hundred four billion, two hundred forty million, thirty-one thousand, two hundred".