320921938 has 4 divisors (see below), whose sum is σ = 481382910. Its totient is φ = 160460968.

The previous prime is 320921929. The next prime is 320921957. The reversal of 320921938 is 839129023.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 303003649 + 17918289 = 17407^2 + 4233^2 .

It is a junction number, because it is equal to n+sod(n) for n = 320921897 and 320921906.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80230483 + ... + 80230486.

Almost surely, 2^320921938 is an apocalyptic number.

320921938 is a deficient number, since it is larger than the sum of its proper divisors (160460972).

320921938 is a wasteful number, since it uses less digits than its factorization.

320921938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160460971.

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 320921938 is about 17914.2942367262. The cubic root of 320921938 is about 684.6466204356.

The spelling of 320921938 in words is "three hundred twenty million, nine hundred twenty-one thousand, nine hundred thirty-eight".