688257652 has 24 divisors (see below), whose sum is σ = 1235166912. Its totient is φ = 335371200.

The previous prime is 688257649. The next prime is 688257659. The reversal of 688257652 is 256752886.

688257652 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 688257596 and 688257605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (688257659) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 208777 + ... + 212047.

It is an arithmetic number, because the mean of its divisors is an integer number (51465288).

Almost surely, 2^688257652 is an apocalyptic number.

It is an amenable number.

688257652 is a deficient number, since it is larger than the sum of its proper divisors (546909260).

688257652 is a wasteful number, since it uses less digits than its factorization.

688257652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4599 (or 4597 counting only the distinct ones).

The product of its digits is 1612800, while the sum is 49.

The square root of 688257652 is about 26234.6650826726. The cubic root of 688257652 is about 882.9111800144.

The spelling of 688257652 in words is "six hundred eighty-eight million, two hundred fifty-seven thousand, six hundred fifty-two".