687228368 has 10 divisors (see below), whose sum is σ = 1331504994. Its totient is φ = 343614176.

The previous prime is 687228329. The next prime is 687228389. The reversal of 687228368 is 863822786.

It can be written as a sum of positive squares in only one way, i.e., 634636864 + 52591504 = 25192^2 + 7252^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21475871 + ... + 21475902.

Almost surely, 2^687228368 is an apocalyptic number.

It is an amenable number.

687228368 is a deficient number, since it is larger than the sum of its proper divisors (644276626).

687228368 is a wasteful number, since it uses less digits than its factorization.

687228368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42951781 (or 42951775 counting only the distinct ones).

The product of its digits is 1548288, while the sum is 50.

The square root of 687228368 is about 26215.0408735138. The cubic root of 687228368 is about 882.4708314798.

The spelling of 687228368 in words is "six hundred eighty-seven million, two hundred twenty-eight thousand, three hundred sixty-eight".