685658244 has 96 divisors (see below), whose sum is σ = 1791175680. Its totient is φ = 203119488.

The previous prime is 685658243. The next prime is 685658249. The reversal of 685658244 is 442856586.

It is a junction number, because it is equal to n+sod(n) for n = 685658193 and 685658202.

It is not an unprimeable number, because it can be changed into a prime (685658243) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 276699 + ... + 279165.

It is an arithmetic number, because the mean of its divisors is an integer number (18658080).

Almost surely, 2^685658244 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 685658244, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (895587840).

685658244 is an abundant number, since it is smaller than the sum of its proper divisors (1105517436).

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

685658244 is a wasteful number, since it uses less digits than its factorization.

685658244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2569 (or 2567 counting only the distinct ones).

The product of its digits is 1843200, while the sum is 48.

The square root of 685658244 is about 26185.0767422973. The cubic root of 685658244 is about 881.7982529189.

The spelling of 685658244 in words is "six hundred eighty-five million, six hundred fifty-eight thousand, two hundred forty-four".