320262728 has 16 divisors (see below), whose sum is σ = 635815980. Its totient is φ = 150711808.

The previous prime is 320262659. The next prime is 320262751. The reversal of 320262728 is 827262023.

It can be written as a sum of positive squares in 2 ways, for example, as 267584164 + 52678564 = 16358^2 + 7258^2 .

It is a junction number, because it is equal to n+sod(n) for n = 320262694 and 320262703.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1177301 + ... + 1177572.

Almost surely, 2^320262728 is an apocalyptic number.

It is an amenable number.

320262728 is a deficient number, since it is larger than the sum of its proper divisors (315553252).

320262728 is a wasteful number, since it uses less digits than its factorization.

320262728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2354896 (or 2354892 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 32.

The square root of 320262728 is about 17895.8857841684. The cubic root of 320262728 is about 684.1775185314.

The spelling of 320262728 in words is "three hundred twenty million, two hundred sixty-two thousand, seven hundred twenty-eight".