685039004 has 24 divisors (see below), whose sum is σ = 1366980048. Its totient is φ = 297573120.

The previous prime is 685039001. The next prime is 685039009. The reversal of 685039004 is 400930586.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685039001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 386582 + ... + 388349.

It is an arithmetic number, because the mean of its divisors is an integer number (56957502).

Almost surely, 2^685039004 is an apocalyptic number.

It is an amenable number.

685039004 is a deficient number, since it is larger than the sum of its proper divisors (681941044).

685039004 is a wasteful number, since it uses less digits than its factorization.

685039004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 774965 (or 774963 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 685039004 is about 26173.2497791161. The cubic root of 685039004 is about 881.5327128480.

It can be divided in two parts, 6850 and 39004, that added together give a palindrome (45854).

The spelling of 685039004 in words is "six hundred eighty-five million, thirty-nine thousand, four".