320403040 has 48 divisors (see below), whose sum is σ = 769804560. Its totient is φ = 125985280.

The previous prime is 320402989. The next prime is 320403053. The reversal of 320403040 is 40304023.

320403040 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7531 + ... + 26410.

It is an arithmetic number, because the mean of its divisors is an integer number (16037595).

Almost surely, 2^320403040 is an apocalyptic number.

It is an amenable number.

320403040 is an abundant number, since it is smaller than the sum of its proper divisors (449401520).

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

320403040 is a wasteful number, since it uses less digits than its factorization.

320403040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34015 (or 34007 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 16.

The square root of 320403040 is about 17899.8055855364. The cubic root of 320403040 is about 684.2774201554.

Adding to 320403040 its reverse (40304023), we get a palindrome (360707063).

The spelling of 320403040 in words is "three hundred twenty million, four hundred three thousand, forty".