400404064444 has 12 divisors (see below), whose sum is σ = 701199538144. Its totient is φ = 200061339264.

The previous prime is 400404064421. The next prime is 400404064499. The reversal of 400404064444 is 444460404004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35166837 + ... + 35178220.

Almost surely, 2^400404064444 is an apocalyptic number.

It is an amenable number.

400404064444 is a deficient number, since it is larger than the sum of its proper divisors (300795473700).

400404064444 is a wasteful number, since it uses less digits than its factorization.

400404064444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70346484 (or 70346482 counting only the distinct ones).

The product of its (nonzero) digits is 98304, while the sum is 34.

Adding to 400404064444 its reverse (444460404004), we get a palindrome (844864468448).

The spelling of 400404064444 in words is "four hundred billion, four hundred four million, sixty-four thousand, four hundred forty-four".