320277328 has 120 divisors (see below), whose sum is σ = 757675464. Its totient is φ = 130636800.

The previous prime is 320277313. The next prime is 320277341. The reversal of 320277328 is 823772023.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 153664 + 320123664 = 392^2 + 17892^2 .

It is a junction number, because it is equal to n+sod(n) for n = 320277293 and 320277302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1769398 + ... + 1769578.

Almost surely, 2^320277328 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 320277328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (378837732).

320277328 is an abundant number, since it is smaller than the sum of its proper divisors (437398136).

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

320277328 is a wasteful number, since it uses less digits than its factorization.

320277328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 301 (or 288 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 34.

The square root of 320277328 is about 17896.2936945056. The cubic root of 320277328 is about 684.1879150373.

The spelling of 320277328 in words is "three hundred twenty million, two hundred seventy-seven thousand, three hundred twenty-eight".