686229872 has 40 divisors (see below), whose sum is σ = 1351163520. Its totient is φ = 337582080.

The previous prime is 686229847. The next prime is 686229877. The reversal of 686229872 is 278922686.

It is a super-2 number, since 2×686229872² = 941822874450272768, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 686229872.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686229877) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 316472 + ... + 318632.

It is an arithmetic number, because the mean of its divisors is an integer number (33779088).

Almost surely, 2^686229872 is an apocalyptic number.

It is an amenable number.

686229872 is a deficient number, since it is larger than the sum of its proper divisors (664933648).

686229872 is a wasteful number, since it uses less digits than its factorization.

686229872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2481 (or 2475 counting only the distinct ones).

The product of its digits is 1161216, while the sum is 50.

The square root of 686229872 is about 26195.9896167333. The cubic root of 686229872 is about 882.0432343237.

The spelling of 686229872 in words is "six hundred eighty-six million, two hundred twenty-nine thousand, eight hundred seventy-two".