685588242 has 8 divisors (see below), whose sum is σ = 1371176496. Its totient is φ = 228529412.

The previous prime is 685588237. The next prime is 685588243. The reversal of 685588242 is 242885586.

It is a happy number.

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

685588242 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 685588191 and 685588200.

It is not an unprimeable number, because it can be changed into a prime (685588243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57132348 + ... + 57132359.

It is an arithmetic number, because the mean of its divisors is an integer number (171397062).

Almost surely, 2^685588242 is an apocalyptic number.

685588242 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

685588242 is a wasteful number, since it uses less digits than its factorization.

685588242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114264712.

The product of its digits is 1228800, while the sum is 48.

The square root of 685588242 is about 26183.7400307901. The cubic root of 685588242 is about 881.7682429527.

The spelling of 685588242 in words is "six hundred eighty-five million, five hundred eighty-eight thousand, two hundred forty-two".