1686200228 has 24 divisors (see below), whose sum is σ = 2993023488. Its totient is φ = 831125376.

The previous prime is 1686200221. The next prime is 1686200249. The reversal of 1686200228 is 8220026861.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (1686200221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82700 + ... + 101052.

It is an arithmetic number, because the mean of its divisors is an integer number (124709312).

Almost surely, 2^1686200228 is an apocalyptic number.

It is an amenable number.

1686200228 is a deficient number, since it is larger than the sum of its proper divisors (1306823260).

1686200228 is a wasteful number, since it uses less digits than its factorization.

1686200228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18683 (or 18681 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 35.

The square root of 1686200228 is about 41063.3684443934. The cubic root of 1686200228 is about 1190.2450423986.

The spelling of 1686200228 in words is "one billion, six hundred eighty-six million, two hundred thousand, two hundred twenty-eight".