688825750 has 16 divisors (see below), whose sum is σ = 1289482272. Its totient is φ = 275530200.

The previous prime is 688825699. The next prime is 688825751. The reversal of 688825750 is 57528886.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 688825694 and 688825703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (688825751) 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, 1377402 + ... + 1377901.

It is an arithmetic number, because the mean of its divisors is an integer number (80592642).

Almost surely, 2^688825750 is an apocalyptic number.

688825750 is a deficient number, since it is larger than the sum of its proper divisors (600656522).

688825750 is a wasteful number, since it uses less digits than its factorization.

688825750 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2755320 (or 2755310 counting only the distinct ones).

The product of its (nonzero) digits is 1075200, while the sum is 49.

The square root of 688825750 is about 26245.4900887753. The cubic root of 688825750 is about 883.1540358371.

The spelling of 688825750 in words is "six hundred eighty-eight million, eight hundred twenty-five thousand, seven hundred fifty".