689634308 has 48 divisors (see below), whose sum is σ = 1439036928. Its totient is φ = 285504000.

The previous prime is 689634307. The next prime is 689634343. The reversal of 689634308 is 803436986.

It is not an unprimeable number, because it can be changed into a prime (689634307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8318 + ... + 38058.

It is an arithmetic number, because the mean of its divisors is an integer number (29979936).

Almost surely, 2^689634308 is an apocalyptic number.

689634308 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

689634308 is an abundant number, since it is smaller than the sum of its proper divisors (749402620).

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

689634308 is a wasteful number, since it uses less digits than its factorization.

689634308 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29804 (or 29802 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 47.

The square root of 689634308 is about 26260.8893223364. The cubic root of 689634308 is about 883.4994555807.

The spelling of 689634308 in words is "six hundred eighty-nine million, six hundred thirty-four thousand, three hundred eight".