306393970 has 16 divisors (see below), whose sum is σ = 553476888. Its totient is φ = 122120320.

The previous prime is 306393953. The next prime is 306393979. The reversal of 306393970 is 79393603.

It can be written as a sum of positive squares in 4 ways, for example, as 186950929 + 119443041 = 13673^2 + 10929^2 .

It is not an unprimeable number, because it can be changed into a prime (306393979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51709 + ... + 57328.

Almost surely, 2^306393970 is an apocalyptic number.

306393970 is a deficient number, since it is larger than the sum of its proper divisors (247082918).

306393970 is a wasteful number, since it uses less digits than its factorization.

306393970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109325.

The product of its (nonzero) digits is 91854, while the sum is 40.

The square root of 306393970 is about 17504.1129452480. The cubic root of 306393970 is about 674.1554833876.

The spelling of 306393970 in words is "three hundred six million, three hundred ninety-three thousand, nine hundred seventy".