404721720000 has 840 divisors, whose sum is σ = 1653277481856. Its totient is φ = 93745152000.

The previous prime is 404721719959. The next prime is 404721720001. The reversal of 404721720000 is 27127404.

It is a happy number.

404721720000 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (404721720001) by changing a digit.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 79557457 + ... + 79562543.

Almost surely, 2^404721720000 is an apocalyptic number.

404721720000 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 404721720000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (826638740928).

404721720000 is an abundant number, since it is smaller than the sum of its proper divisors (1248555761856).

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

404721720000 is a wasteful number, since it uses less digits than its factorization.

404721720000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5155 (or 5127 counting only the distinct ones).

The product of its (nonzero) digits is 3136, while the sum is 27.

Adding to 404721720000 its reverse (27127404), we get a palindrome (404748847404).

The spelling of 404721720000 in words is "four hundred four billion, seven hundred twenty-one million, seven hundred twenty thousand".