685524798 has 144 divisors (see below), whose sum is σ = 1843845120. Its totient is φ = 183107232.

The previous prime is 685524773. The next prime is 685524799. The reversal of 685524798 is 897425586.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685524799) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 953083 + ... + 953801.

It is an arithmetic number, because the mean of its divisors is an integer number (12804480).

Almost surely, 2^685524798 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 685524798, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (921922560).

685524798 is an abundant number, since it is smaller than the sum of its proper divisors (1158320322).

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

685524798 is a wasteful number, since it uses less digits than its factorization.

685524798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 811 (or 801 counting only the distinct ones).

The product of its digits is 4838400, while the sum is 54.

The square root of 685524798 is about 26182.5284875239. The cubic root of 685524798 is about 881.7410426466.

The spelling of 685524798 in words is "six hundred eighty-five million, five hundred twenty-four thousand, seven hundred ninety-eight".