999685228 has 12 divisors (see below), whose sum is σ = 1841525560. Its totient is φ = 473535072.

The previous prime is 999685223. The next prime is 999685229. The reversal of 999685228 is 822586999.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (999685223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6576801 + ... + 6576952.

Almost surely, 2^999685228 is an apocalyptic number.

It is an amenable number.

999685228 is a deficient number, since it is larger than the sum of its proper divisors (841840332).

999685228 is a wasteful number, since it uses less digits than its factorization.

999685228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13153776 (or 13153774 counting only the distinct ones).

The product of its digits is 5598720, while the sum is 58.

The square root of 999685228 is about 31617.7992276502. The cubic root of 999685228 is about 999.8950649890.

The spelling of 999685228 in words is "nine hundred ninety-nine million, six hundred eighty-five thousand, two hundred twenty-eight".