320827680 has 144 divisors (see below), whose sum is σ = 1130298624. Its totient is φ = 82782720.

The previous prime is 320827643. The next prime is 320827693. The reversal of 320827680 is 86728023.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (144).

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

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 23 ways as a sum of consecutive naturals, for example, 41047 + ... + 48233.

It is an arithmetic number, because the mean of its divisors is an integer number (7849296).

Almost surely, 2^320827680 is an apocalyptic number.

320827680 is a gapful number since it is divisible by the number (30) 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 320827680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (565149312).

320827680 is an abundant number, since it is smaller than the sum of its proper divisors (809470944).

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

320827680 is a wasteful number, since it uses less digits than its factorization.

320827680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7239 (or 7228 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 320827680 is about 17911.6632393533. The cubic root of 320827680 is about 684.5795846733.

The spelling of 320827680 in words is "three hundred twenty million, eight hundred twenty-seven thousand, six hundred eighty".