400004452321 has 8 divisors (see below), whose sum is σ = 417434860800. Its totient is φ = 382577286432.

The previous prime is 400004452319. The next prime is 400004452327. The reversal of 400004452321 is 123254400004.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 400004452321 - 2¹ = 400004452319 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400004452327) 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, 556860 + ... + 1053613.

It is an arithmetic number, because the mean of its divisors is an integer number (52179357600).

Almost surely, 2^400004452321 is an apocalyptic number.

It is an amenable number.

400004452321 is a deficient number, since it is larger than the sum of its proper divisors (17430408479).

400004452321 is a wasteful number, since it uses less digits than its factorization.

400004452321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1621295.

The product of its (nonzero) digits is 3840, while the sum is 25.

Adding to 400004452321 its reverse (123254400004), we get a palindrome (523258852325).

The spelling of 400004452321 in words is "four hundred billion, four million, four hundred fifty-two thousand, three hundred twenty-one".