685414144 has 36 divisors (see below), whose sum is σ = 1372709520. Its totient is φ = 341565440.

The previous prime is 685414133. The next prime is 685414153. The reversal of 685414144 is 441414586.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75312 + ... + 83920.

It is an arithmetic number, because the mean of its divisors is an integer number (38130820).

Almost surely, 2^685414144 is an apocalyptic number.

685414144 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 685414144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (686354760).

685414144 is an abundant number, since it is smaller than the sum of its proper divisors (687295376).

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

685414144 is an equidigital number, since it uses as much as digits as its factorization.

685414144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8936 (or 8922 counting only the distinct ones).

The product of its digits is 61440, while the sum is 37.

The square root of 685414144 is about 26180.4152755452. The cubic root of 685414144 is about 881.6935980107.

The spelling of 685414144 in words is "six hundred eighty-five million, four hundred fourteen thousand, one hundred forty-four".