685541740 has 36 divisors (see below), whose sum is σ = 1558905264. Its totient is φ = 253121856.

The previous prime is 685541693. The next prime is 685541783. The reversal of 685541740 is 47145586.

It is a junction number, because it is equal to n+sod(n) for n = 685541693 and 685541702.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 98032 + ... + 104791.

It is an arithmetic number, because the mean of its divisors is an integer number (43302924).

Almost surely, 2^685541740 is an apocalyptic number.

It is an amenable number.

685541740 is an abundant number, since it is smaller than the sum of its proper divisors (873363524).

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

685541740 is a wasteful number, since it uses less digits than its factorization.

685541740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202858 (or 202843 counting only the distinct ones).

The product of its (nonzero) digits is 134400, while the sum is 40.

The square root of 685541740 is about 26182.8520218864. The cubic root of 685541740 is about 881.7483063438.

The spelling of 685541740 in words is "six hundred eighty-five million, five hundred forty-one thousand, seven hundred forty".