402421333424 has 160 divisors (see below), whose sum is σ = 871824824640. Its totient is φ = 179908608000.

The previous prime is 402421333409. The next prime is 402421333441. The reversal of 402421333424 is 424333124204.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 456777464 + ... + 456778344.

It is an arithmetic number, because the mean of its divisors is an integer number (5448905154).

Almost surely, 2^402421333424 is an apocalyptic number.

402421333424 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 402421333424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (435912412320).

402421333424 is an abundant number, since it is smaller than the sum of its proper divisors (469403491216).

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

402421333424 is a wasteful number, since it uses less digits than its factorization.

402421333424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1252 (or 1224 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 32.

Adding to 402421333424 its reverse (424333124204), we get a palindrome (826754457628).

The spelling of 402421333424 in words is "four hundred two billion, four hundred twenty-one million, three hundred thirty-three thousand, four hundred twenty-four".