403401320 has 48 divisors (see below), whose sum is σ = 1055846340. Its totient is φ = 138308352.

The previous prime is 403401319. The next prime is 403401353. The reversal of 403401320 is 23104304.

It can be written as a sum of positive squares in 2 ways, for example, as 400240036 + 3161284 = 20006^2 + 1778^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 100949 + ... + 104868.

Almost surely, 2^403401320 is an apocalyptic number.

403401320 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

403401320 is an abundant number, since it is smaller than the sum of its proper divisors (652445020).

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

403401320 is a wasteful number, since it uses less digits than its factorization.

403401320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205842 (or 205831 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 403401320 is about 20084.8529992131. The cubic root of 403401320 is about 738.8888363599. Note that the first 4 decimals are identical.

Adding to 403401320 its reverse (23104304), we get a palindrome (426505624).

The spelling of 403401320 in words is "four hundred three million, four hundred one thousand, three hundred twenty".