320653986 has 16 divisors (see below), whose sum is σ = 663422400. Its totient is φ = 103198928.

The previous prime is 320653981. The next prime is 320653997. The reversal of 320653986 is 689356023.

It is not an unprimeable number, because it can be changed into a prime (320653981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 921246 + ... + 921593.

It is an arithmetic number, because the mean of its divisors is an integer number (41463900).

Almost surely, 2^320653986 is an apocalyptic number.

320653986 is an abundant number, since it is smaller than the sum of its proper divisors (342768414).

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

320653986 is a wasteful number, since it uses less digits than its factorization.

320653986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1842873.

The product of its (nonzero) digits is 233280, while the sum is 42.

The square root of 320653986 is about 17906.8139544700. The cubic root of 320653986 is about 684.4560200738.

The spelling of 320653986 in words is "three hundred twenty million, six hundred fifty-three thousand, nine hundred eighty-six".