304640145 has 24 divisors (see below), whose sum is σ = 530712000. Its totient is φ = 161653536.

The previous prime is 304640137. The next prime is 304640173. The reversal of 304640145 is 541046403.

304640145 is a `hidden beast` number, since 3 + 0 + 4 + 640 + 14 + 5 = 666.

It is not a de Polignac number, because 304640145 - 2³ = 304640137 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8055 + ... + 25964.

It is an arithmetic number, because the mean of its divisors is an integer number (22113000).

Almost surely, 2^304640145 is an apocalyptic number.

It is an amenable number.

304640145 is a deficient number, since it is larger than the sum of its proper divisors (226071855).

304640145 is a wasteful number, since it uses less digits than its factorization.

304640145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34229 (or 34226 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 304640145 is about 17453.9435372067. The cubic root of 304640145 is about 672.8667135719.

Adding to 304640145 its reverse (541046403), we get a palindrome (845686548).

The spelling of 304640145 in words is "three hundred four million, six hundred forty thousand, one hundred forty-five".