400420324431 has 12 divisors (see below), whose sum is σ = 579278870352. Its totient is φ = 266534287296.

The previous prime is 400420324411. The next prime is 400420324439. The reversal of 400420324431 is 134423024004.

It is a happy number.

400420324431 is a `hidden beast` number, since 4 + 0 + 0 + 4 + 203 + 24 + 431 = 666.

It is not a de Polignac number, because 400420324431 - 2²⁵ = 400386769999 is a prime.

It is a super-2 number, since 2×400420324431² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 400420324395 and 400420324404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400420324439) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34376826 + ... + 34388471.

It is an arithmetic number, because the mean of its divisors is an integer number (48273239196).

Almost surely, 2^400420324431 is an apocalyptic number.

400420324431 is a deficient number, since it is larger than the sum of its proper divisors (178858545921).

400420324431 is a wasteful number, since it uses less digits than its factorization.

400420324431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68765950 (or 68765947 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 27.

Adding to 400420324431 its reverse (134423024004), we get a palindrome (534843348435).

The spelling of 400420324431 in words is "four hundred billion, four hundred twenty million, three hundred twenty-four thousand, four hundred thirty-one".