320068656 has 90 divisors (see below), whose sum is σ = 951661932. Its totient is φ = 100400640.

The previous prime is 320068613. The next prime is 320068703. The reversal of 320068656 is 656860023.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 320068656.

It is an unprimeable number.

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 17 ways as a sum of consecutive naturals, for example, 37771 + ... + 45461.

Almost surely, 2^320068656 is an apocalyptic number.

320068656 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 320068656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (475830966).

320068656 is an abundant number, since it is smaller than the sum of its proper divisors (631593276).

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

320068656 is a wasteful number, since it uses less digits than its factorization.

320068656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7739 (or 7713 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 320068656 is about 17890.4627106176. The cubic root of 320068656 is about 684.0392918847.

The spelling of 320068656 in words is "three hundred twenty million, sixty-eight thousand, six hundred fifty-six".