402224431312 has 80 divisors (see below), whose sum is σ = 881779705344. Its totient is φ = 176126400000.

The previous prime is 402224431291. The next prime is 402224431313. The reversal of 402224431312 is 213134422204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402224431313) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 351937 + ... + 963487.

Almost surely, 2^402224431312 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 402224431312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (440889852672).

402224431312 is an abundant number, since it is smaller than the sum of its proper divisors (479555274032).

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

402224431312 is a wasteful number, since it uses less digits than its factorization.

402224431312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 611708 (or 611702 counting only the distinct ones).

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

Adding to 402224431312 its reverse (213134422204), we get a palindrome (615358853516).

The spelling of 402224431312 in words is "four hundred two billion, two hundred twenty-four million, four hundred thirty-one thousand, three hundred twelve".