688494 has 8 divisors (see below), whose sum is σ = 1377000. Its totient is φ = 229496.

The previous prime is 688477. The next prime is 688511. The reversal of 688494 is 494886.

It is an interprime number because it is at equal distance from previous prime (688477) and next prime (688511).

It is a sphenic number, since it is the product of 3 distinct primes.

688494 is an admirable number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 688494.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57369 + ... + 57380.

It is an arithmetic number, because the mean of its divisors is an integer number (172125).

2⁶⁸⁸⁴⁹⁴ is an apocalyptic number.

688494 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

688494 is a wasteful number, since it uses less digits than its factorization.

688494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114754.

The product of its digits is 55296, while the sum is 39.

The square root of 688494 is about 829.7553856409. The cubic root of 688494 is about 88.3012232486.

The spelling of 688494 in words is "six hundred eighty-eight thousand, four hundred ninety-four".