404120020 has 24 divisors (see below), whose sum is σ = 868389984. Its totient is φ = 157888416.

The previous prime is 404119981. The next prime is 404120021. The reversal of 404120020 is 20021404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404120021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 234094 + ... + 235813.

It is an arithmetic number, because the mean of its divisors is an integer number (36182916).

Almost surely, 2^404120020 is an apocalyptic number.

It is an amenable number.

404120020 is an abundant number, since it is smaller than the sum of its proper divisors (464269964).

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

404120020 is a wasteful number, since it uses less digits than its factorization.

404120020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 469959 (or 469957 counting only the distinct ones).

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

The square root of 404120020 is about 20102.7366296233. The cubic root of 404120020 is about 739.3273776053.

Adding to 404120020 its reverse (20021404), we get a palindrome (424141424).

The spelling of 404120020 in words is "four hundred four million, one hundred twenty thousand, twenty".