404443531242 has 16 divisors (see below), whose sum is σ = 898763402880. Its totient is φ = 134814510396.

The previous prime is 404443531223. The next prime is 404443531249. The reversal of 404443531242 is 242135344404.

404443531242 is a `hidden beast` number, since 4 + 0 + 44 + 43 + 531 + 2 + 42 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 404443531197 and 404443531206.

It is not an unprimeable number, because it can be changed into a prime (404443531249) 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, 3744847458 + ... + 3744847565.

It is an arithmetic number, because the mean of its divisors is an integer number (56172712680).

Almost surely, 2^404443531242 is an apocalyptic number.

404443531242 is an abundant number, since it is smaller than the sum of its proper divisors (494319871638).

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

404443531242 is a wasteful number, since it uses less digits than its factorization.

404443531242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7489695034 (or 7489695028 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 36.

Adding to 404443531242 its reverse (242135344404), we get a palindrome (646578875646).

The spelling of 404443531242 in words is "four hundred four billion, four hundred forty-three million, five hundred thirty-one thousand, two hundred forty-two".