320340040 has 32 divisors (see below), whose sum is σ = 721586880. Its totient is φ = 127989952.

The previous prime is 320339953. The next prime is 320340073. The reversal of 320340040 is 40043023.

It is a junction number, because it is equal to n+sod(n) for n = 320339996 and 320340023.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35247 + ... + 43393.

It is an arithmetic number, because the mean of its divisors is an integer number (22549590).

Almost surely, 2^320340040 is an apocalyptic number.

It is an amenable number.

320340040 is an abundant number, since it is smaller than the sum of its proper divisors (401246840).

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

320340040 is a wasteful number, since it uses less digits than its factorization.

320340040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9141 (or 9137 counting only the distinct ones).

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

The square root of 320340040 is about 17898.0457033722. The cubic root of 320340040 is about 684.2325679975.

Adding to 320340040 its reverse (40043023), we get a palindrome (360383063).

It can be divided in two parts, 3203 and 40040, that multiplied together give a triangular number (128248120 = T₁₆₀₁₅).

The spelling of 320340040 in words is "three hundred twenty million, three hundred forty thousand, forty".