313130728 has 16 divisors (see below), whose sum is σ = 587368260. Its totient is φ = 156499200.

The previous prime is 313130711. The next prime is 313130729. The reversal of 313130728 is 827031313.

It can be written as a sum of positive squares in 2 ways, for example, as 286895844 + 26234884 = 16938^2 + 5122^2 .

It is a junction number, because it is equal to n+sod(n) for n = 313130696 and 313130705.

It is not an unprimeable number, because it can be changed into a prime (313130729) 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 3 ways as a sum of consecutive naturals, for example, 16048 + ... + 29728.

Almost surely, 2^313130728 is an apocalyptic number.

It is an amenable number.

313130728 is a deficient number, since it is larger than the sum of its proper divisors (274237532).

313130728 is a wasteful number, since it uses less digits than its factorization.

313130728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16548 (or 16544 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 313130728 is about 17695.5002189822. The cubic root of 313130728 is about 679.0606464557.

The spelling of 313130728 in words is "three hundred thirteen million, one hundred thirty thousand, seven hundred twenty-eight".