320200000331440 has 40 divisors (see below), whose sum is σ = 744560532183168. Its totient is φ = 128063564620800.

The previous prime is 320200000331377. The next prime is 320200000331461. The reversal of 320200000331440 is 44133000002023.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×320200000331440² (a number of 30 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 256177536 + ... + 257424415.

Almost surely, 2^{320200000331440} is an apocalyptic number.

It is an amenable number.

320200000331440 is an abundant number, since it is smaller than the sum of its proper divisors (424360531851728).

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

320200000331440 is a wasteful number, since it uses less digits than its factorization.

320200000331440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 513609757 (or 513609751 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 22.

Adding to 320200000331440 its reverse (44133000002023), we get a palindrome (364333000333463).

The spelling of 320200000331440 in words is "three hundred twenty trillion, two hundred billion, three hundred thirty-one thousand, four hundred forty".