306730 has 16 divisors (see below), whose sum is σ = 567720. Its totient is φ = 119232.

The previous prime is 306727. The next prime is 306739. The reversal of 306730 is 37603.

It is a happy number.

306730 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 294849 + 11881 = 543^2 + 109^2 .

It is a junction number, because it is equal to n+sod(n) for n = 306698 and 306707.

It is not an unprimeable number, because it can be changed into a prime (306739) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45 + ... + 784.

2³⁰⁶⁷³⁰ is an apocalyptic number.

306730 is a deficient number, since it is larger than the sum of its proper divisors (260990).

306730 is a wasteful number, since it uses less digits than its factorization.

306730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 873.

The product of its (nonzero) digits is 378, while the sum is 19.

The square root of 306730 is about 553.8321045227. The cubic root of 306730 is about 67.4401847789.

The spelling of 306730 in words is "three hundred six thousand, seven hundred thirty".