404010020 has 24 divisors (see below), whose sum is σ = 877678200. Its totient is φ = 156031232.

The previous prime is 404010001. The next prime is 404010031. The reversal of 404010020 is 20010404.

It can be written as a sum of positive squares in 4 ways, for example, as 58644964 + 345365056 = 7658^2 + 18584^2 .

It is a junction number, because it is equal to n+sod(n) for n = 404009983 and 404010010.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 347705 + ... + 348864.

It is an arithmetic number, because the mean of its divisors is an integer number (36569925).

Almost surely, 2^404010020 is an apocalyptic number.

It is an amenable number.

404010020 is an abundant number, since it is smaller than the sum of its proper divisors (473668180).

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

404010020 is a wasteful number, since it uses less digits than its factorization.

404010020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 696607 (or 696605 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 11.

The square root of 404010020 is about 20100.0004975124. Note that the first 3 decimals coincide. The cubic root of 404010020 is about 739.2602907767.

Adding to 404010020 its reverse (20010404), we get a palindrome (424020424).

The spelling of 404010020 in words is "four hundred four million, ten thousand, twenty".