688730 has 16 divisors (see below), whose sum is σ = 1416960. Its totient is φ = 236112.

The previous prime is 688729. The next prime is 688733. The reversal of 688730 is 37886.

It is not an unprimeable number, because it can be changed into a prime (688733) 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, 4850 + ... + 4989.

It is an arithmetic number, because the mean of its divisors is an integer number (88560).

2⁶⁸⁸⁷³⁰ is an apocalyptic number.

688730 is an abundant number, since it is smaller than the sum of its proper divisors (728230).

It is a weird number, because it is abundant, but not a pseudoperfect number.

688730 is a wasteful number, since it uses less digits than its factorization.

688730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9853.

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 688730 is about 829.8975840428. The cubic root of 688730 is about 88.3113113094.

The spelling of 688730 in words is "six hundred eighty-eight thousand, seven hundred thirty".