686416692 has 96 divisors (see below), whose sum is σ = 1816835328. Its totient is φ = 200116224.

The previous prime is 686416651. The next prime is 686416729. The reversal of 686416692 is 296614686.

It is a happy number.

686416692 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 404598 + ... + 406290.

It is an arithmetic number, because the mean of its divisors is an integer number (18925368).

Almost surely, 2^686416692 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 686416692, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (908417664).

686416692 is an abundant number, since it is smaller than the sum of its proper divisors (1130418636).

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

686416692 is a wasteful number, since it uses less digits than its factorization.

686416692 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1849 (or 1847 counting only the distinct ones).

The product of its digits is 746496, while the sum is 48.

The square root of 686416692 is about 26199.5551870638. Note that the first 3 decimals coincide. The cubic root of 686416692 is about 882.1232698785.

The spelling of 686416692 in words is "six hundred eighty-six million, four hundred sixteen thousand, six hundred ninety-two".