320234440 has 32 divisors (see below), whose sum is σ = 762913080. Its totient is φ = 120558592.

The previous prime is 320234407. The next prime is 320234441. The reversal of 320234440 is 44432023.

It can be written as a sum of positive squares in 4 ways, for example, as 252237924 + 67996516 = 15882^2 + 8246^2 .

It is a super-2 number, since 2×320234440² = 205100193124227200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (320234441) by changing a digit.

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, 234787 + ... + 236146.

Almost surely, 2^320234440 is an apocalyptic number.

It is an amenable number.

320234440 is an abundant number, since it is smaller than the sum of its proper divisors (442678640).

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

320234440 is a wasteful number, since it uses less digits than its factorization.

320234440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 470961 (or 470957 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 22.

The square root of 320234440 is about 17895.0954174601. The cubic root of 320234440 is about 684.1573740460.

Adding to 320234440 its reverse (44432023), we get a palindrome (364666463).

It can be divided in two parts, 32023 and 4440, that added together give a palindrome (36463).

The spelling of 320234440 in words is "three hundred twenty million, two hundred thirty-four thousand, four hundred forty".