402143321240 has 64 divisors (see below), whose sum is σ = 965859552000. Its totient is φ = 150244778880.

The previous prime is 402143321227. The next prime is 402143321257. The reversal of 402143321240 is 42123341204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3672350 + ... + 3780269.

It is an arithmetic number, because the mean of its divisors is an integer number (15091555500).

Almost surely, 2^402143321240 is an apocalyptic number.

402143321240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

402143321240 is an abundant number, since it is smaller than the sum of its proper divisors (563716230760).

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

402143321240 is a wasteful number, since it uses less digits than its factorization.

402143321240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7452720 (or 7452716 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 402143321240 its reverse (42123341204), we get a palindrome (444266662444).

The spelling of 402143321240 in words is "four hundred two billion, one hundred forty-three million, three hundred twenty-one thousand, two hundred forty".