400140323 has 16 divisors (see below), whose sum is σ = 460857600. Its totient is φ = 343594080.

The previous prime is 400140319. The next prime is 400140329. The reversal of 400140323 is 323041004.

It is a cyclic number.

It is not a de Polignac number, because 400140323 - 2² = 400140319 is a prime.

It is a super-2 number, since 2×400140323² = 320224556181088658, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400140329) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72365 + ... + 77697.

It is an arithmetic number, because the mean of its divisors is an integer number (28803600).

Almost surely, 2^400140323 is an apocalyptic number.

400140323 is a deficient number, since it is larger than the sum of its proper divisors (60717277).

400140323 is a wasteful number, since it uses less digits than its factorization.

400140323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5722.

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 400140323 is about 20003.5077673892. The cubic root of 400140323 is about 736.8924487136.

Adding to 400140323 its reverse (323041004), we get a palindrome (723181327).

The spelling of 400140323 in words is "four hundred million, one hundred forty thousand, three hundred twenty-three".