405442004 has 48 divisors (see below), whose sum is σ = 798383040. Its totient is φ = 178536960.

The previous prime is 405442001. The next prime is 405442031. The reversal of 405442004 is 400244504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405442001) 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 15 ways as a sum of consecutive naturals, for example, 548267 + ... + 549005.

It is an arithmetic number, because the mean of its divisors is an integer number (16632980).

Almost surely, 2^405442004 is an apocalyptic number.

405442004 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

405442004 is a deficient number, since it is larger than the sum of its proper divisors (392941036).

405442004 is a wasteful number, since it uses less digits than its factorization.

405442004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1128 (or 1126 counting only the distinct ones).

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

The square root of 405442004 is about 20135.5904805397. The cubic root of 405442004 is about 740.1326789125.

Adding to 405442004 its reverse (400244504), we get a palindrome (805686508).

The spelling of 405442004 in words is "four hundred five million, four hundred forty-two thousand, four".