400022443 has 2 divisors, whose sum is σ = 400022444. Its totient is φ = 400022442.

The previous prime is 400022309. The next prime is 400022473. The reversal of 400022443 is 344220004.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-400022443 is a prime.

It is a super-3 number, since 3×400022443³ (a number of 27 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 400022443.

It is not a weakly prime, because it can be changed into another prime (400022473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200011221 + 200011222.

It is an arithmetic number, because the mean of its divisors is an integer number (200011222).

Almost surely, 2^400022443 is an apocalyptic number.

400022443 is a deficient number, since it is larger than the sum of its proper divisors (1).

400022443 is an equidigital number, since it uses as much as digits as its factorization.

400022443 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 768, while the sum is 19.

The square root of 400022443 is about 20000.5610671301. The cubic root of 400022443 is about 736.8200795902.

Adding to 400022443 its reverse (344220004), we get a palindrome (744242447).

The spelling of 400022443 in words is "four hundred million, twenty-two thousand, four hundred forty-three".