400442211 has 20 divisors (see below), whose sum is σ = 644207872. Its totient is φ = 246425328.

The previous prime is 400442197. The next prime is 400442243. The reversal of 400442211 is 112244004.

400442211 is a `hidden beast` number, since 400 + 44 + 221 + 1 = 666.

It is not a de Polignac number, because 400442211 - 2¹³ = 400434019 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400442291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 189091 + ... + 191196.

Almost surely, 2^400442211 is an apocalyptic number.

400442211 is a deficient number, since it is larger than the sum of its proper divisors (243765661).

400442211 is a wasteful number, since it uses less digits than its factorization.

400442211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 380312 (or 380303 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 400442211 is about 20011.0522212102. The cubic root of 400442211 is about 737.0777196074.

Adding to 400442211 its reverse (112244004), we get a palindrome (512686215).

The spelling of 400442211 in words is "four hundred million, four hundred forty-two thousand, two hundred eleven".