685888488 has 24 divisors (see below), whose sum is σ = 1857614850. Its totient is φ = 228629472.

The previous prime is 685888403. The next prime is 685888517. The reversal of 685888488 is 884888586.

685888488 is a `hidden beast` number, since 6 + 8 + 588 + 8 + 48 + 8 = 666.

685888488 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 446815044 + 239073444 = 21138^2 + 15462^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×685888488² = 940886035941852288, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4763043 + ... + 4763186.

Almost surely, 2^685888488 is an apocalyptic number.

It is an amenable number.

685888488 is an abundant number, since it is smaller than the sum of its proper divisors (1171726362).

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

685888488 is a wasteful number, since it uses less digits than its factorization.

685888488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9526241 (or 9526234 counting only the distinct ones).

The product of its digits is 31457280, while the sum is 63.

The square root of 685888488 is about 26189.4728469284. The cubic root of 685888488 is about 881.8969444742.

The spelling of 685888488 in words is "six hundred eighty-five million, eight hundred eighty-eight thousand, four hundred eighty-eight".