688573938 has 24 divisors (see below), whose sum is σ = 1491233328. Its totient is φ = 211868592.

The previous prime is 688573937. The next prime is 688573939. The reversal of 688573938 is 839375886.

688573938 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (688573937) and next prime (688573939).

It is not an unprimeable number, because it can be changed into a prime (688573937) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 338520 + ... + 340547.

It is an arithmetic number, because the mean of its divisors is an integer number (62134722).

Almost surely, 2^688573938 is an apocalyptic number.

688573938 is an abundant number, since it is smaller than the sum of its proper divisors (802659390).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

688573938 is a wasteful number, since it uses less digits than its factorization.

688573938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 679098 (or 679085 counting only the distinct ones).

The product of its digits is 8709120, while the sum is 57.

The square root of 688573938 is about 26240.6924070231. The cubic root of 688573938 is about 883.0464053810.

The spelling of 688573938 in words is "six hundred eighty-eight million, five hundred seventy-three thousand, nine hundred thirty-eight".