685380136 has 32 divisors (see below), whose sum is σ = 1486376640. Its totient is φ = 290193408.

The previous prime is 685380131. The next prime is 685380161. The reversal of 685380136 is 631083586.

It is not an unprimeable number, because it can be changed into a prime (685380131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69081 + ... + 78376.

It is an arithmetic number, because the mean of its divisors is an integer number (46449270).

Almost surely, 2^685380136 is an apocalyptic number.

It is an amenable number.

685380136 is an abundant number, since it is smaller than the sum of its proper divisors (800996504).

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

685380136 is a wasteful number, since it uses less digits than its factorization.

685380136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147553 (or 147549 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 40.

The square root of 685380136 is about 26179.7657743533. The cubic root of 685380136 is about 881.6790155221.

The spelling of 685380136 in words is "six hundred eighty-five million, three hundred eighty thousand, one hundred thirty-six".