400444017 has 4 divisors (see below), whose sum is σ = 533925360. Its totient is φ = 266962676.

The previous prime is 400444003. The next prime is 400444021. The reversal of 400444017 is 710444004.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 400444017 - 2⁷ = 400443889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (400444087) 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 3 ways as a sum of consecutive naturals, for example, 66740667 + ... + 66740672.

It is an arithmetic number, because the mean of its divisors is an integer number (133481340).

Almost surely, 2^400444017 is an apocalyptic number.

It is an amenable number.

400444017 is a deficient number, since it is larger than the sum of its proper divisors (133481343).

400444017 is a wasteful number, since it uses less digits than its factorization.

400444017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133481342.

The product of its (nonzero) digits is 1792, while the sum is 24.

The square root of 400444017 is about 20011.0973462227. The cubic root of 400444017 is about 737.0788276827.

The spelling of 400444017 in words is "four hundred million, four hundred forty-four thousand, seventeen".