688750426 has 16 divisors (see below), whose sum is σ = 1271539584. Its totient is φ = 272472624.

The previous prime is 688750417. The next prime is 688750429. The reversal of 688750426 is 624057886.

It is not an unprimeable number, because it can be changed into a prime (688750429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1891990 + ... + 1892353.

It is an arithmetic number, because the mean of its divisors is an integer number (79471224).

Almost surely, 2^688750426 is an apocalyptic number.

688750426 is a deficient number, since it is larger than the sum of its proper divisors (582789158).

688750426 is a wasteful number, since it uses less digits than its factorization.

688750426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3784365.

The product of its (nonzero) digits is 645120, while the sum is 46.

The square root of 688750426 is about 26244.0550601465. The cubic root of 688750426 is about 883.1218433126.

The spelling of 688750426 in words is "six hundred eighty-eight million, seven hundred fifty thousand, four hundred twenty-six".