400044541 has 8 divisors (see below), whose sum is σ = 430986584. Its totient is φ = 369126720.

The previous prime is 400044529. The next prime is 400044581. The reversal of 400044541 is 145440004.

It can be written as a sum of positive squares in 4 ways, for example, as 2042041 + 398002500 = 1429^2 + 19950^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 400044541 - 2¹¹ = 400042493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400044511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43051 + ... + 51511.

It is an arithmetic number, because the mean of its divisors is an integer number (53873323).

Almost surely, 2^400044541 is an apocalyptic number.

It is an amenable number.

400044541 is a deficient number, since it is larger than the sum of its proper divisors (30942043).

400044541 is a wasteful number, since it uses less digits than its factorization.

400044541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12111.

The product of its (nonzero) digits is 1280, while the sum is 22.

The square root of 400044541 is about 20001.1134940033. The cubic root of 400044541 is about 736.8336471209.

Adding to 400044541 its reverse (145440004), we get a palindrome (545484545).

The spelling of 400044541 in words is "four hundred million, forty-four thousand, five hundred forty-one".