685187384 has 48 divisors (see below), whose sum is σ = 1497050280. Its totient is φ = 293146560.

The previous prime is 685187369. The next prime is 685187401. The reversal of 685187384 is 483781586.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 307394 + ... + 309614.

Almost surely, 2^685187384 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 685187384, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (748525140).

685187384 is an abundant number, since it is smaller than the sum of its proper divisors (811862896).

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

685187384 is a wasteful number, since it uses less digits than its factorization.

685187384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3028 (or 3017 counting only the distinct ones).

The product of its digits is 1290240, while the sum is 50.

The square root of 685187384 is about 26176.0841991311. The cubic root of 685187384 is about 881.5963551517.

The spelling of 685187384 in words is "six hundred eighty-five million, one hundred eighty-seven thousand, three hundred eighty-four".