688942 has 16 divisors (see below), whose sum is σ = 1143072. Its totient is φ = 309760.

The previous prime is 688939. The next prime is 688951. The reversal of 688942 is 249886.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 342 + ... + 1222.

It is an arithmetic number, because the mean of its divisors is an integer number (71442).

2⁶⁸⁸⁹⁴² is an apocalyptic number.

688942 is a deficient number, since it is larger than the sum of its proper divisors (454130).

688942 is a wasteful number, since it uses less digits than its factorization.

688942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 923.

The product of its digits is 27648, while the sum is 37.

The square root of 688942 is about 830.0253008192. The cubic root of 688942 is about 88.3203715011.

The spelling of 688942 in words is "six hundred eighty-eight thousand, nine hundred forty-two".