304720945 has 16 divisors (see below), whose sum is σ = 371059920. Its totient is φ = 240205824.

The previous prime is 304720931. The next prime is 304720957. The reversal of 304720945 is 549027403.

It can be written as a sum of positive squares in 8 ways, for example, as 31281649 + 273439296 = 5593^2 + 16536^2 .

It is a cyclic number.

It is not a de Polignac number, because 304720945 - 2⁷ = 304720817 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 304720945.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 103737 + ... + 106633.

It is an arithmetic number, because the mean of its divisors is an integer number (23191245).

Almost surely, 2^304720945 is an apocalyptic number.

It is an amenable number.

304720945 is a deficient number, since it is larger than the sum of its proper divisors (66338975).

304720945 is a wasteful number, since it uses less digits than its factorization.

304720945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3204.

The product of its (nonzero) digits is 30240, while the sum is 34.

The square root of 304720945 is about 17456.2580469011. The cubic root of 304720945 is about 672.9261966762.

The spelling of 304720945 in words is "three hundred four million, seven hundred twenty thousand, nine hundred forty-five".