403321320 has 48 divisors (see below), whose sum is σ = 1310795460. Its totient is φ = 107552256.

The previous prime is 403321313. The next prime is 403321339. The reversal of 403321320 is 23123304.

It can be written as a sum of positive squares in 2 ways, for example, as 403286724 + 34596 = 20082^2 + 186^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 403321293 and 403321302.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 559809 + ... + 560528.

Almost surely, 2^403321320 is an apocalyptic number.

403321320 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

403321320 is an abundant number, since it is smaller than the sum of its proper divisors (907474140).

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

403321320 is a wasteful number, since it uses less digits than its factorization.

403321320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1120354 (or 1120347 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

The square root of 403321320 is about 20082.8613499172. The cubic root of 403321320 is about 738.8399892095.

Adding to 403321320 its reverse (23123304), we get a palindrome (426444624).

The spelling of 403321320 in words is "four hundred three million, three hundred twenty-one thousand, three hundred twenty".