999967228 has 48 divisors (see below), whose sum is σ = 1996001280. Its totient is φ = 434833344.

The previous prime is 999967181. The next prime is 999967229. The reversal of 999967228 is 822769999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999967229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 73893 + ... + 86371.

It is an arithmetic number, because the mean of its divisors is an integer number (41583360).

Almost surely, 2^999967228 is an apocalyptic number.

It is an amenable number.

999967228 is a deficient number, since it is larger than the sum of its proper divisors (996034052).

999967228 is a wasteful number, since it uses less digits than its factorization.

999967228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12586 (or 12584 counting only the distinct ones).

The product of its digits is 8817984, while the sum is 61.

The square root of 999967228 is about 31622.2584266210. The cubic root of 999967228 is about 999.9890758807.

The spelling of 999967228 in words is "nine hundred ninety-nine million, nine hundred sixty-seven thousand, two hundred twenty-eight".