402431143420 has 24 divisors (see below), whose sum is σ = 874246968000. Its totient is φ = 155421682752.

The previous prime is 402431143409. The next prime is 402431143469. The reversal of 402431143420 is 24341134204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 346922820 + ... + 346923979.

It is an arithmetic number, because the mean of its divisors is an integer number (36426957000).

Almost surely, 2^402431143420 is an apocalyptic number.

It is an amenable number.

402431143420 is an abundant number, since it is smaller than the sum of its proper divisors (471815824580).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

402431143420 is a wasteful number, since it uses less digits than its factorization.

402431143420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 693846837 (or 693846835 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 28.

Subtracting from 402431143420 its product of nonzero digits (9216), we obtain a palindrome (402431134204).

Adding to 402431143420 its reverse (24341134204), we get a palindrome (426772277624).

The spelling of 402431143420 in words is "four hundred two billion, four hundred thirty-one million, one hundred forty-three thousand, four hundred twenty".