405420404 has 24 divisors (see below), whose sum is σ = 747600000. Its totient is φ = 191842560.

The previous prime is 405420397. The next prime is 405420409. The reversal of 405420404 is 404024504.

It is a super-3 number, since 3×405420404³ (a number of 27 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 405420404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405420409) 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 7 ways as a sum of consecutive naturals, for example, 92789 + ... + 97059.

It is an arithmetic number, because the mean of its divisors is an integer number (31150000).

Almost surely, 2^405420404 is an apocalyptic number.

It is an amenable number.

405420404 is a deficient number, since it is larger than the sum of its proper divisors (342179596).

405420404 is a wasteful number, since it uses less digits than its factorization.

405420404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5543 (or 5541 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 23.

The square root of 405420404 is about 20135.0541096864. The cubic root of 405420404 is about 740.1195351093.

Adding to 405420404 its reverse (404024504), we get a palindrome (809444908).

The spelling of 405420404 in words is "four hundred five million, four hundred twenty thousand, four hundred four".