688260085 has 16 divisors (see below), whose sum is σ = 870154560. Its totient is φ = 521164800.

The previous prime is 688260077. The next prime is 688260101. The reversal of 688260085 is 580062886.

It is a happy number.

It is not a de Polignac number, because 688260085 - 2³ = 688260077 is a prime.

It is a congruent number.

It is an unprimeable number.

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, 135349 + ... + 140341.

It is an arithmetic number, because the mean of its divisors is an integer number (54384660).

Almost surely, 2^688260085 is an apocalyptic number.

It is an amenable number.

688260085 is a deficient number, since it is larger than the sum of its proper divisors (181894475).

688260085 is a wasteful number, since it uses less digits than its factorization.

688260085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6468.

The product of its (nonzero) digits is 184320, while the sum is 43.

The square root of 688260085 is about 26234.7114525775. The cubic root of 688260085 is about 882.9122203808.

The spelling of 688260085 in words is "six hundred eighty-eight million, two hundred sixty thousand, eighty-five".