404412020 has 12 divisors (see below), whose sum is σ = 849265284. Its totient is φ = 161764800.

The previous prime is 404411999. The next prime is 404412023. The reversal of 404412020 is 20214404.

It can be written as a sum of positive squares in 2 ways, for example, as 238208356 + 166203664 = 15434^2 + 12892^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 404412020.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404412023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10110281 + ... + 10110320.

It is an arithmetic number, because the mean of its divisors is an integer number (70772107).

Almost surely, 2^404412020 is an apocalyptic number.

It is an amenable number.

404412020 is an abundant number, since it is smaller than the sum of its proper divisors (444853264).

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

404412020 is a wasteful number, since it uses less digits than its factorization.

404412020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20220610 (or 20220608 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 404412020 is about 20109.9980109397. The cubic root of 404412020 is about 739.5054036110.

Adding to 404412020 its reverse (20214404), we get a palindrome (424626424).

The spelling of 404412020 in words is "four hundred four million, four hundred twelve thousand, twenty".