404000042004 has 72 divisors (see below), whose sum is σ = 1100550403680. Its totient is φ = 124220388672.

The previous prime is 404000042003. The next prime is 404000042009. The reversal of 404000042004 is 400240000404.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404000042003) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 365367 + ... + 970305.

Almost surely, 2^404000042004 is an apocalyptic number.

It is an amenable number.

404000042004 is an abundant number, since it is smaller than the sum of its proper divisors (696550361676).

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

404000042004 is a wasteful number, since it uses less digits than its factorization.

404000042004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 606389 (or 606384 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 18.

Adding to 404000042004 its reverse (400240000404), we get a palindrome (804240042408).

The spelling of 404000042004 in words is "four hundred four billion, forty-two thousand, four".