686880216 has 192 divisors, whose sum is σ = 2151727200. Its totient is φ = 202752000.

The previous prime is 686880203. The next prime is 686880217. The reversal of 686880216 is 612088686.

It is a super-2 number, since 2×686880216² = 943608862264413312, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686880217) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1071256 + ... + 1071896.

Almost surely, 2^686880216 is an apocalyptic number.

686880216 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 686880216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1075863600).

686880216 is an abundant number, since it is smaller than the sum of its proper divisors (1464846984).

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

686880216 is a wasteful number, since it uses less digits than its factorization.

686880216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 719 (or 698 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 45.

The square root of 686880216 is about 26208.3997222265. The cubic root of 686880216 is about 882.3217854976.

The spelling of 686880216 in words is "six hundred eighty-six million, eight hundred eighty thousand, two hundred sixteen".