403220321320 has 64 divisors (see below), whose sum is σ = 921370982400. Its totient is φ = 158796368640.

The previous prime is 403220321279. The next prime is 403220321321. The reversal of 403220321320 is 23123022304.

It is a junction number, because it is equal to n+sod(n) for n = 403220321291 and 403220321300.

It is not an unprimeable number, because it can be changed into a prime (403220321321) 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, 362526 + ... + 968434.

It is an arithmetic number, because the mean of its divisors is an integer number (14396421600).

Almost surely, 2^403220321320 is an apocalyptic number.

403220321320 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

403220321320 is an abundant number, since it is smaller than the sum of its proper divisors (518150661080).

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

403220321320 is a wasteful number, since it uses less digits than its factorization.

403220321320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 606178 (or 606174 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 22.

Adding to 403220321320 its reverse (23123022304), we get a palindrome (426343343624).

The spelling of 403220321320 in words is "four hundred three billion, two hundred twenty million, three hundred twenty-one thousand, three hundred twenty".