685468344 has 64 divisors (see below), whose sum is σ = 1876919040. Its totient is φ = 206888960.

The previous prime is 685468319. The next prime is 685468349. The reversal of 685468344 is 443864586.

It is a super-2 number, since 2×685468344² = 939733701252204672, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 685468293 and 685468302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685468349) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 62797 + ... + 72899.

It is an arithmetic number, because the mean of its divisors is an integer number (29326860).

Almost surely, 2^685468344 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 685468344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (938459520).

685468344 is an abundant number, since it is smaller than the sum of its proper divisors (1191450696).

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

685468344 is a wasteful number, since it uses less digits than its factorization.

685468344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10380 (or 10376 counting only the distinct ones).

The product of its digits is 2211840, while the sum is 48.

The square root of 685468344 is about 26181.4503799923. The cubic root of 685468344 is about 881.7168377477.

The spelling of 685468344 in words is "six hundred eighty-five million, four hundred sixty-eight thousand, three hundred forty-four".