402144434220 has 48 divisors (see below), whose sum is σ = 1126137747168. Its totient is φ = 107225817600.

The previous prime is 402144434213. The next prime is 402144434257. The reversal of 402144434220 is 22434441204.

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 119670 + ... + 904770.

It is an arithmetic number, because the mean of its divisors is an integer number (23461203066).

Almost surely, 2^402144434220 is an apocalyptic number.

It is an amenable number.

402144434220 is an abundant number, since it is smaller than the sum of its proper divisors (723993312948).

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

402144434220 is a wasteful number, since it uses less digits than its factorization.

402144434220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 793650 (or 793648 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 30.

Adding to 402144434220 its reverse (22434441204), we get a palindrome (424578875424).

The spelling of 402144434220 in words is "four hundred two billion, one hundred forty-four million, four hundred thirty-four thousand, two hundred twenty".