400044443 has 2 divisors, whose sum is σ = 400044444. Its totient is φ = 400044442.

The previous prime is 400044419. The next prime is 400044461. The reversal of 400044443 is 344440004.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 400044443 - 2²² = 395850139 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (400044643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200022221 + 200022222.

It is an arithmetic number, because the mean of its divisors is an integer number (200022222).

Almost surely, 2^400044443 is an apocalyptic number.

400044443 is a deficient number, since it is larger than the sum of its proper divisors (1).

400044443 is an equidigital number, since it uses as much as digits as its factorization.

400044443 is an evil number, because the sum of its binary digits is even.

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

The square root of 400044443 is about 20001.1110441395. Note that the first 3 decimals coincide. The cubic root of 400044443 is about 736.8335869528.

Adding to 400044443 its reverse (344440004), we get a palindrome (744484447).

The spelling of 400044443 in words is "four hundred million, forty-four thousand, four hundred forty-three".