686573356 has 48 divisors (see below), whose sum is σ = 1468418112. Its totient is φ = 274176000.

The previous prime is 686573317. The next prime is 686573359. The reversal of 686573356 is 653375686.

It is not an unprimeable number, because it can be changed into a prime (686573359) 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, 40936 + ... + 55216.

It is an arithmetic number, because the mean of its divisors is an integer number (30592044).

Almost surely, 2^686573356 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 686573356, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (734209056).

686573356 is an abundant number, since it is smaller than the sum of its proper divisors (781844756).

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

686573356 is a wasteful number, since it uses less digits than its factorization.

686573356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14410 (or 14408 counting only the distinct ones).

The product of its digits is 2721600, while the sum is 49.

The square root of 686573356 is about 26202.5448382404. The cubic root of 686573356 is about 882.1903751073.

The spelling of 686573356 in words is "six hundred eighty-six million, five hundred seventy-three thousand, three hundred fifty-six".