688681014 has 16 divisors (see below), whose sum is σ = 1574128128. Its totient is φ = 196765992.

The previous prime is 688681013. The next prime is 688681039. The reversal of 688681014 is 410186886.

It is a Harshad number since it is a multiple of its sum of digits (42), and also a Moran number because the ratio is a prime number: 16397167 = 688681014 / (6 + 8 + 8 + 6 + 8 + 1 + 0 + 1 + 4).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (688681013) 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, 8198542 + ... + 8198625.

It is an arithmetic number, because the mean of its divisors is an integer number (98383008).

Almost surely, 2^688681014 is an apocalyptic number.

688681014 is an abundant number, since it is smaller than the sum of its proper divisors (885447114).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

688681014 is a wasteful number, since it uses less digits than its factorization.

688681014 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16397179.

The product of its (nonzero) digits is 73728, while the sum is 42.

The square root of 688681014 is about 26242.7325939964. The cubic root of 688681014 is about 883.0921754240.

The spelling of 688681014 in words is "six hundred eighty-eight million, six hundred eighty-one thousand, fourteen".