400040004443 has 4 divisors (see below), whose sum is σ = 400041848208. Its totient is φ = 400038160680.

The previous prime is 400040004391. The next prime is 400040004461. The reversal of 400040004443 is 344400040004.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 400040004443 - 2⁶ = 400040004379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400040004493) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 545096 + ... + 1047477.

It is an arithmetic number, because the mean of its divisors is an integer number (100010462052).

Almost surely, 2^400040004443 is an apocalyptic number.

400040004443 is a deficient number, since it is larger than the sum of its proper divisors (1843765).

400040004443 is a wasteful number, since it uses less digits than its factorization.

400040004443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1843764.

The product of its (nonzero) digits is 3072, while the sum is 23.

Adding to 400040004443 its reverse (344400040004), we get a palindrome (744440044447).

The spelling of 400040004443 in words is "four hundred billion, forty million, four thousand, four hundred forty-three".