688470 has 32 divisors (see below), whose sum is σ = 1687392. Its totient is φ = 179712.

The previous prime is 688453. The next prime is 688477. The reversal of 688470 is 74886.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (688477) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1374 + ... + 1806.

It is an arithmetic number, because the mean of its divisors is an integer number (52731).

2⁶⁸⁸⁴⁷⁰ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 688470, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (843696).

688470 is an abundant number, since it is smaller than the sum of its proper divisors (998922).

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

688470 is a wasteful number, since it uses less digits than its factorization.

688470 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 496.

The product of its (nonzero) digits is 10752, while the sum is 33.

The square root of 688470 is about 829.7409234213. The cubic root of 688470 is about 88.3001972149.

The spelling of 688470 in words is "six hundred eighty-eight thousand, four hundred seventy".