404002020004 has 24 divisors (see below), whose sum is σ = 771377177088. Its totient is φ = 183613331040.

The previous prime is 404002019999. The next prime is 404002020013. The reversal of 404002020004 is 400020200404.

It is a self number, because there is not a number n which added to its sum of digits gives 404002020004.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 255364 + ... + 934459.

It is an arithmetic number, because the mean of its divisors is an integer number (32140715712).

Almost surely, 2^404002020004 is an apocalyptic number.

404002020004 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

404002020004 is a deficient number, since it is larger than the sum of its proper divisors (367375157084).

404002020004 is a wasteful number, since it uses less digits than its factorization.

404002020004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1197555 (or 1197553 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 16.

Adding to 404002020004 its reverse (400020200404), we get a palindrome (804022220408).

The spelling of 404002020004 in words is "four hundred four billion, two million, twenty thousand, four".