320043431040 has 64 divisors (see below), whose sum is σ = 1020138442560. Its totient is φ = 85344914432.

The previous prime is 320043431039. The next prime is 320043431129. The reversal of 320043431040 is 40134340023.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 320043431040.

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, 83342724 + ... + 83346563.

It is an arithmetic number, because the mean of its divisors is an integer number (15939663165).

Almost surely, 2^320043431040 is an apocalyptic number.

320043431040 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

320043431040 is an abundant number, since it is smaller than the sum of its proper divisors (700095011520).

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

320043431040 is a wasteful number, since it uses less digits than its factorization.

320043431040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166689309 (or 166689297 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 24.

Adding to 320043431040 its reverse (40134340023), we get a palindrome (360177771063).

The spelling of 320043431040 in words is "three hundred twenty billion, forty-three million, four hundred thirty-one thousand, forty".