686230416 has 135 divisors (see below), whose sum is σ = 2007821361. Its totient is φ = 218788992.

The previous prime is 686230399. The next prime is 686230427. The reversal of 686230416 is 614032686.

The square root of 686230416 is 26196.

It is a perfect power (a square), and thus also a powerful number.

686230416 is a `hidden beast` number, since 6 + 8 + 6 + 230 + 416 = 666.

It can be written as a sum of positive squares in only one way, i.e., 614048400 + 72182016 = 24780^2 + 8496^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 11630995 + ... + 11631053.

Almost surely, 2^686230416 is an apocalyptic number.

686230416 is the 26196-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 686230416

686230416 is an abundant number, since it is smaller than the sum of its proper divisors (1321590945).

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

686230416 is a wasteful number, since it uses less digits than its factorization.

686230416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206 (or 101 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The cubic root of 686230416 is about 882.0434673998.

Multiplying 686230416 by its sum of digits (36), we get a square (24704294976 = 157176²).

686230416 divided by its sum of digits (36) gives a square (19061956 = 4366²).

The spelling of 686230416 in words is "six hundred eighty-six million, two hundred thirty thousand, four hundred sixteen".