400440240412343 has 16 divisors (see below), whose sum is σ = 402460678198656. Its totient is φ = 398424824313120.

The previous prime is 400440240412313. The next prime is 400440240412357. The reversal of 400440240412343 is 343214042044004.

It is a cyclic number.

It is not a de Polignac number, because 400440240412343 - 2⁸ = 400440240412087 is a prime.

It is a super-2 number, since 2×400440240412343² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400440240412313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 662919113 + ... + 663522893.

It is an arithmetic number, because the mean of its divisors is an integer number (25153792387416).

Almost surely, 2^{400440240412343} is an apocalyptic number.

400440240412343 is a deficient number, since it is larger than the sum of its proper divisors (2020437786313).

400440240412343 is a wasteful number, since it uses less digits than its factorization.

400440240412343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 607934.

The product of its (nonzero) digits is 147456, while the sum is 35.

Adding to 400440240412343 its reverse (343214042044004), we get a palindrome (743654282456347).

The spelling of 400440240412343 in words is "four hundred trillion, four hundred forty billion, two hundred forty million, four hundred twelve thousand, three hundred forty-three".