307631668 has 6 divisors (see below), whose sum is σ = 538355426. Its totient is φ = 153815832.

The previous prime is 307631633. The next prime is 307631669. The reversal of 307631668 is 866136703.

It can be written as a sum of positive squares in only one way, i.e., 206267044 + 101364624 = 14362^2 + 10068^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 307631668.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (307631669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38453955 + ... + 38453962.

Almost surely, 2^307631668 is an apocalyptic number.

It is an amenable number.

307631668 is a deficient number, since it is larger than the sum of its proper divisors (230723758).

307631668 is a wasteful number, since it uses less digits than its factorization.

307631668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76907921 (or 76907919 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 40.

The square root of 307631668 is about 17539.4318037957. The cubic root of 307631668 is about 675.0620285019.

The spelling of 307631668 in words is "three hundred seven million, six hundred thirty-one thousand, six hundred sixty-eight".