307681568 has 24 divisors (see below), whose sum is σ = 614050668. Its totient is φ = 151732224.

The previous prime is 307681547. The next prime is 307681601. The reversal of 307681568 is 865186703.

It can be written as a sum of positive squares in 2 ways, for example, as 301786384 + 5895184 = 17372^2 + 2428^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63521 + ... + 68192.

Almost surely, 2^307681568 is an apocalyptic number.

It is an amenable number.

307681568 is a deficient number, since it is larger than the sum of its proper divisors (306369100).

307681568 is a wasteful number, since it uses less digits than its factorization.

307681568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131796 (or 131788 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 44.

The square root of 307681568 is about 17540.8542551382. The cubic root of 307681568 is about 675.0985264501.

The spelling of 307681568 in words is "three hundred seven million, six hundred eighty-one thousand, five hundred sixty-eight".