688241234 has 8 divisors (see below), whose sum is σ = 1032622668. Its totient is φ = 344033680.

The previous prime is 688241231. The next prime is 688241291. The reversal of 688241234 is 432142886.

It can be written as a sum of positive squares in 2 ways, for example, as 647855209 + 40386025 = 25453^2 + 6355^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (688241231) 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 3 ways as a sum of consecutive naturals, for example, 33077 + ... + 49704.

Almost surely, 2^688241234 is an apocalyptic number.

688241234 is a deficient number, since it is larger than the sum of its proper divisors (344381434).

688241234 is a wasteful number, since it uses less digits than its factorization.

688241234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86940.

The product of its digits is 73728, while the sum is 38.

The square root of 688241234 is about 26234.3521742009. The cubic root of 688241234 is about 882.9041595084.

The spelling of 688241234 in words is "six hundred eighty-eight million, two hundred forty-one thousand, two hundred thirty-four".