400444444443 has 32 divisors (see below), whose sum is σ = 540237600000. Its totient is φ = 263827760000.

The previous prime is 400444444441. The next prime is 400444444453. The reversal of 400444444443 is 344444444004.

It is a cyclic number.

It is not a de Polignac number, because 400444444443 - 2¹ = 400444444441 is a prime.

It is not an unprimeable number, because it can be changed into a prime (400444444441) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 168182113 + ... + 168184493.

It is an arithmetic number, because the mean of its divisors is an integer number (16882425000).

Almost surely, 2^400444444443 is an apocalyptic number.

400444444443 is a deficient number, since it is larger than the sum of its proper divisors (139793155557).

400444444443 is a wasteful number, since it uses less digits than its factorization.

400444444443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4283.

The product of its (nonzero) digits is 786432, while the sum is 39.

Adding to 400444444443 its reverse (344444444004), we get a palindrome (744888888447).

The spelling of 400444444443 in words is "four hundred billion, four hundred forty-four million, four hundred forty-four thousand, four hundred forty-three".