320490064 has 10 divisors (see below), whose sum is σ = 620949530. Its totient is φ = 160245024.

The previous prime is 320490047. The next prime is 320490077. The reversal of 320490064 is 460094023.

It can be written as a sum of positive squares in only one way, i.e., 319694400 + 795664 = 17880^2 + 892^2 .

It is a super-2 number, since 2×320490064² = 205427762245448192, which contains 22 as substring.

It is a congruent number.

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, 10015299 + ... + 10015330.

It is an arithmetic number, because the mean of its divisors is an integer number (62094953).

Almost surely, 2^320490064 is an apocalyptic number.

It is an amenable number.

320490064 is a deficient number, since it is larger than the sum of its proper divisors (300459466).

320490064 is a wasteful number, since it uses less digits than its factorization.

320490064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20030637 (or 20030631 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 320490064 is about 17902.2362848891. The cubic root of 320490064 is about 684.3393662674.

The spelling of 320490064 in words is "three hundred twenty million, four hundred ninety thousand, sixty-four".