306316240 has 20 divisors (see below), whose sum is σ = 712185444. Its totient is φ = 122526464.

The previous prime is 306316237. The next prime is 306316247. The reversal of 306316240 is 42613603.

It can be written as a sum of positive squares in 2 ways, for example, as 77580864 + 228735376 = 8808^2 + 15124^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (306316247) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1914397 + ... + 1914556.

Almost surely, 2^306316240 is an apocalyptic number.

It is an amenable number.

306316240 is an abundant number, since it is smaller than the sum of its proper divisors (405869204).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

306316240 is a wasteful number, since it uses less digits than its factorization.

306316240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3828966 (or 3828960 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 25.

The square root of 306316240 is about 17501.8924691017. The cubic root of 306316240 is about 674.0984690610.

Adding to 306316240 its reverse (42613603), we get a palindrome (348929843).

The spelling of 306316240 in words is "three hundred six million, three hundred sixteen thousand, two hundred forty".