400444411 has 2 divisors, whose sum is σ = 400444412. Its totient is φ = 400444410.

The previous prime is 400444409. The next prime is 400444433. The reversal of 400444411 is 114444004.

It is a happy number.

It is an a-pointer prime, because the next prime (400444433) can be obtained adding 400444411 to its sum of digits (22).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 400444411 - 2¹ = 400444409 is a prime.

It is a super-2 number, since 2×400444411² = 320711452602273842, which contains 22 as substring.

Together with 400444409, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (400444481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200222205 + 200222206.

It is an arithmetic number, because the mean of its divisors is an integer number (200222206).

Almost surely, 2^400444411 is an apocalyptic number.

400444411 is a deficient number, since it is larger than the sum of its proper divisors (1).

400444411 is an equidigital number, since it uses as much as digits as its factorization.

400444411 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1024, while the sum is 22.

The square root of 400444411 is about 20011.1071907578. The cubic root of 400444411 is about 737.0790694219.

Adding to 400444411 its reverse (114444004), we get a palindrome (514888415).

The spelling of 400444411 in words is "four hundred million, four hundred forty-four thousand, four hundred eleven".