320987301940 has 12 divisors (see below), whose sum is σ = 674073334116. Its totient is φ = 128394920768.

The previous prime is 320987301917. The next prime is 320987301977. The reversal of 320987301940 is 49103789023.

It can be written as a sum of positive squares in 2 ways, for example, as 35465928976 + 285521372964 = 188324^2 + 534342^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8024682529 + ... + 8024682568.

It is an arithmetic number, because the mean of its divisors is an integer number (56172777843).

Almost surely, 2^320987301940 is an apocalyptic number.

It is an amenable number.

320987301940 is an abundant number, since it is smaller than the sum of its proper divisors (353086032176).

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

320987301940 is a wasteful number, since it uses less digits than its factorization.

320987301940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16049365106 (or 16049365104 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 46.

The spelling of 320987301940 in words is "three hundred twenty billion, nine hundred eighty-seven million, three hundred one thousand, nine hundred forty".