688362868 has 6 divisors (see below), whose sum is σ = 1204635026. Its totient is φ = 344181432.

The previous prime is 688362863. The next prime is 688362881. The reversal of 688362868 is 868263886.

It can be written as a sum of positive squares in only one way, i.e., 373726224 + 314636644 = 19332^2 + 17738^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (688362863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86045355 + ... + 86045362.

Almost surely, 2^688362868 is an apocalyptic number.

It is an amenable number.

688362868 is a deficient number, since it is larger than the sum of its proper divisors (516272158).

688362868 is a wasteful number, since it uses less digits than its factorization.

688362868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172090721 (or 172090719 counting only the distinct ones).

The product of its digits is 5308416, while the sum is 55.

The square root of 688362868 is about 26236.6702917882. The cubic root of 688362868 is about 882.9561688104.

It can be divided in two parts, 6883 and 62868, that added together give a triangular number (69751 = T₃₇₃).

The spelling of 688362868 in words is "six hundred eighty-eight million, three hundred sixty-two thousand, eight hundred sixty-eight".