320351994 has 24 divisors (see below), whose sum is σ = 712856820. Its totient is φ = 103897728.

The previous prime is 320351987. The next prime is 320352001. The reversal of 320351994 is 499153023.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (320351987) and next prime (320352001).

It can be written as a sum of positive squares in 2 ways, for example, as 294980625 + 25371369 = 17175^2 + 5037^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 239839 + ... + 241170.

Almost surely, 2^320351994 is an apocalyptic number.

320351994 is an abundant number, since it is smaller than the sum of its proper divisors (392504826).

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

320351994 is a wasteful number, since it uses less digits than its factorization.

320351994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 481054 (or 481051 counting only the distinct ones).

The product of its (nonzero) digits is 29160, while the sum is 36.

The square root of 320351994 is about 17898.3796473312. The cubic root of 320351994 is about 684.2410789685.

The spelling of 320351994 in words is "three hundred twenty million, three hundred fifty-one thousand, nine hundred ninety-four".