688416231 has 8 divisors (see below), whose sum is σ = 918085360. Its totient is φ = 458845632.

The previous prime is 688416221. The next prime is 688416233. The reversal of 688416231 is 132614886.

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

It is not a de Polignac number, because 688416231 - 2⁷ = 688416103 is a prime.

It is a super-2 number, since 2×688416231² = 947833814208490722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 688416231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (688416233) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6400 + ... + 37653.

It is an arithmetic number, because the mean of its divisors is an integer number (114760670).

Almost surely, 2^688416231 is an apocalyptic number.

688416231 is a deficient number, since it is larger than the sum of its proper divisors (229669129).

688416231 is a wasteful number, since it uses less digits than its factorization.

688416231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49265.

The product of its digits is 55296, while the sum is 39.

The square root of 688416231 is about 26237.6872265831. The cubic root of 688416231 is about 882.9789842831.

The spelling of 688416231 in words is "six hundred eighty-eight million, four hundred sixteen thousand, two hundred thirty-one".