404420 has 24 divisors (see below), whose sum is σ = 864024. Its totient is φ = 158976.

The previous prime is 404419. The next prime is 404423. The reversal of 404420 is 24404.

It can be written as a sum of positive squares in 4 ways, for example, as 12544 + 391876 = 112^2 + 626^2 .

It is a nialpdrome in base 14.

It is a junction number, because it is equal to n+sod(n) for n = 404395 and 404404.

It is not an unprimeable number, because it can be changed into a prime (404423) 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, 1322 + ... + 1598.

It is an arithmetic number, because the mean of its divisors is an integer number (36001).

2⁴⁰⁴⁴²⁰ is an apocalyptic number.

It is an amenable number.

404420 is an abundant number, since it is smaller than the sum of its proper divisors (459604).

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

404420 is a wasteful number, since it uses less digits than its factorization.

404420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359 (or 357 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 14.

The square root of 404420 is about 635.9402487656. The cubic root of 404420 is about 73.9510267639.

Adding to 404420 its reverse (24404), we get a palindrome (428824).

The spelling of 404420 in words is "four hundred four thousand, four hundred twenty", and thus it is an iban number.