400044543 has 16 divisors (see below), whose sum is σ = 560014080. Its totient is φ = 253528704.

The previous prime is 400044529. The next prime is 400044581. The reversal of 400044543 is 345440004.

It is not a de Polignac number, because 400044543 - 2⁵ = 400044511 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400044443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6538 + ... + 29031.

It is an arithmetic number, because the mean of its divisors is an integer number (35000880).

Almost surely, 2^400044543 is an apocalyptic number.

400044543 is a deficient number, since it is larger than the sum of its proper divisors (159969537).

400044543 is a wasteful number, since it uses less digits than its factorization.

400044543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35758.

The product of its (nonzero) digits is 3840, while the sum is 24.

The square root of 400044543 is about 20001.1135440005. The cubic root of 400044543 is about 736.8336483488.

Adding to 400044543 its reverse (345440004), we get a palindrome (745484547).

The spelling of 400044543 in words is "four hundred million, forty-four thousand, five hundred forty-three".