320804670 has 64 divisors (see below), whose sum is σ = 799165440. Its totient is φ = 82320000.

The previous prime is 320804669. The next prime is 320804677. The reversal of 320804670 is 76408023.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320804677) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 426795 + ... + 427545.

It is an arithmetic number, because the mean of its divisors is an integer number (12486960).

Almost surely, 2^320804670 is an apocalyptic number.

320804670 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 320804670, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (399582720).

320804670 is an abundant number, since it is smaller than the sum of its proper divisors (478360770).

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

320804670 is a wasteful number, since it uses less digits than its factorization.

320804670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1281.

The product of its (nonzero) digits is 8064, while the sum is 30.

The square root of 320804670 is about 17911.0209089264. The cubic root of 320804670 is about 684.5632180963.

The spelling of 320804670 in words is "three hundred twenty million, eight hundred four thousand, six hundred seventy".