685041906 has 16 divisors (see below), whose sum is σ = 1414280448. Its totient is φ = 220981200.

The previous prime is 685041883. The next prime is 685041919. The reversal of 685041906 is 609140586.

685041906 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×685041906² = 938564825952225672, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1841325 + ... + 1841696.

It is an arithmetic number, because the mean of its divisors is an integer number (88392528).

Almost surely, 2^685041906 is an apocalyptic number.

685041906 is an abundant number, since it is smaller than the sum of its proper divisors (729238542).

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

685041906 is a wasteful number, since it uses less digits than its factorization.

685041906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3683057.

The product of its (nonzero) digits is 51840, while the sum is 39.

The square root of 685041906 is about 26173.3052173393. The cubic root of 685041906 is about 881.5339576454.

The spelling of 685041906 in words is "six hundred eighty-five million, forty-one thousand, nine hundred six".