688552 has 8 divisors (see below), whose sum is σ = 1291050. Its totient is φ = 344272.

The previous prime is 688543. The next prime is 688561. The reversal of 688552 is 255886.

It is an interprime number because it is at equal distance from previous prime (688543) and next prime (688561).

It can be written as a sum of positive squares in only one way, i.e., 617796 + 70756 = 786^2 + 266^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a pancake number, because a pancake can be divided into 688552 parts by 1173 straight cuts.

It is an unprimeable number.

688552 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43027 + ... + 43042.

2⁶⁸⁸⁵⁵² is an apocalyptic number.

It is an amenable number.

688552 is a deficient number, since it is larger than the sum of its proper divisors (602498).

688552 is a wasteful number, since it uses less digits than its factorization.

688552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86075 (or 86071 counting only the distinct ones).

The product of its digits is 19200, while the sum is 34.

The square root of 688552 is about 829.7903349642. The cubic root of 688552 is about 88.3037027314.

The spelling of 688552 in words is "six hundred eighty-eight thousand, five hundred fifty-two".