688545322 has 8 divisors (see below), whose sum is σ = 1093572036. Its totient is φ = 324021312.

The previous prime is 688545311. The next prime is 688545329. The reversal of 688545322 is 223545886.

It can be written as a sum of positive squares in 2 ways, for example, as 684816561 + 3728761 = 26169^2 + 1931^2 .

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

It is a super-3 number, since 3×688545322³ (a number of 27 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (688545329) 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, 10125633 + ... + 10125700.

Almost surely, 2^688545322 is an apocalyptic number.

688545322 is a deficient number, since it is larger than the sum of its proper divisors (405026714).

688545322 is a wasteful number, since it uses less digits than its factorization.

688545322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20251352.

The product of its digits is 460800, while the sum is 43.

The square root of 688545322 is about 26240.1471413557. The cubic root of 688545322 is about 883.0341725596.

The spelling of 688545322 in words is "six hundred eighty-eight million, five hundred forty-five thousand, three hundred twenty-two".