404020120 has 64 divisors (see below), whose sum is σ = 1043611200. Its totient is φ = 137894400.

The previous prime is 404020103. The next prime is 404020121. The reversal of 404020120 is 21020404.

It is a self number, because there is not a number n which added to its sum of digits gives 404020120.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404020121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60970 + ... + 67270.

It is an arithmetic number, because the mean of its divisors is an integer number (16306425).

Almost surely, 2^404020120 is an apocalyptic number.

404020120 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 404020120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (521805600).

404020120 is an abundant number, since it is smaller than the sum of its proper divisors (639591080).

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

404020120 is a wasteful number, since it uses less digits than its factorization.

404020120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6548 (or 6544 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 404020120 is about 20100.2517397171. The cubic root of 404020120 is about 739.2664510750.

Adding to 404020120 its reverse (21020404), we get a palindrome (425040524).

The spelling of 404020120 in words is "four hundred four million, twenty thousand, one hundred twenty".