688012 has 24 divisors (see below), whose sum is σ = 1319472. Its totient is φ = 312000.

The previous prime is 688003. The next prime is 688013. The reversal of 688012 is 210886.

688012 = T₁₆₈ + T₁₆₉ + ... + T₂₀₆.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (688013) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5187 + ... + 5317.

It is an arithmetic number, because the mean of its divisors is an integer number (54978).

2⁶⁸⁸⁰¹² is an apocalyptic number.

It is an amenable number.

688012 is a deficient number, since it is larger than the sum of its proper divisors (631460).

688012 is a wasteful number, since it uses less digits than its factorization.

688012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249 (or 247 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 25.

The square root of 688012 is about 829.4648877439. The cubic root of 688012 is about 88.2806125022.

Adding to 688012 its reverse (210886), we get a palindrome (898898).

The spelling of 688012 in words is "six hundred eighty-eight thousand, twelve".