688711552 has 16 divisors (see below), whose sum is σ = 1372042800. Its totient is φ = 344355712.

The previous prime is 688711549. The next prime is 688711561. The reversal of 688711552 is 255117886.

It is a tau number, because it is divible by the number of its divisors (16).

It is a junction number, because it is equal to n+sod(n) for n = 688711499 and 688711508.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2690152 + ... + 2690407.

It is an arithmetic number, because the mean of its divisors is an integer number (85752675).

Almost surely, 2^688711552 is an apocalyptic number.

It is an amenable number.

688711552 is a deficient number, since it is larger than the sum of its proper divisors (683331248).

688711552 is an equidigital number, since it uses as much as digits as its factorization.

688711552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5380573 (or 5380561 counting only the distinct ones).

The product of its digits is 134400, while the sum is 43.

The square root of 688711552 is about 26243.3144248207. The cubic root of 688711552 is about 883.1052281386.

The spelling of 688711552 in words is "six hundred eighty-eight million, seven hundred eleven thousand, five hundred fifty-two".