688728339 has 24 divisors (see below), whose sum is σ = 1111040112. Its totient is φ = 423830880.

The previous prime is 688728281. The next prime is 688728367. The reversal of 688728339 is 933827886.

It is not a de Polignac number, because 688728339 - 2⁷ = 688728211 is a prime.

It is not an unprimeable number, because it can be changed into a prime (688720339) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 105852 + ... + 112169.

It is an arithmetic number, because the mean of its divisors is an integer number (46293338).

Almost surely, 2^688728339 is an apocalyptic number.

688728339 is a deficient number, since it is larger than the sum of its proper divisors (422311773).

688728339 is a wasteful number, since it uses less digits than its factorization.

688728339 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218049 (or 218037 counting only the distinct ones).

The product of its digits is 3483648, while the sum is 54.

The square root of 688728339 is about 26243.6342567107. The cubic root of 688728339 is about 883.1124031633.

The spelling of 688728339 in words is "six hundred eighty-eight million, seven hundred twenty-eight thousand, three hundred thirty-nine".