686461700 has 54 divisors (see below), whose sum is σ = 1582467726. Its totient is φ = 258421760.

The previous prime is 686461693. The next prime is 686461733. The reversal of 686461700 is 7164686.

It can be written as a sum of positive squares in 9 ways, for example, as 11397376 + 675064324 = 3376^2 + 25982^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 17024 + ... + 40776.

Almost surely, 2^686461700 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 686461700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (791233863).

686461700 is an abundant number, since it is smaller than the sum of its proper divisors (896006026).

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

686461700 is a wasteful number, since it uses less digits than its factorization.

686461700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23801 (or 23777 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 686461700 is about 26200.4141188646. The cubic root of 686461700 is about 882.1425495847.

The spelling of 686461700 in words is "six hundred eighty-six million, four hundred sixty-one thousand, seven hundred".