999220712 has 16 divisors (see below), whose sum is σ = 2141187360. Its totient is φ = 428237424.

The previous prime is 999220669. The next prime is 999220721. The reversal of 999220712 is 217022999.

It is a self number, because there is not a number n which added to its sum of digits gives 999220712.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8921558 + ... + 8921669.

It is an arithmetic number, because the mean of its divisors is an integer number (133824210).

Almost surely, 2^999220712 is an apocalyptic number.

It is an amenable number.

999220712 is an abundant number, since it is smaller than the sum of its proper divisors (1141966648).

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

999220712 is a wasteful number, since it uses less digits than its factorization.

999220712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17843240 (or 17843236 counting only the distinct ones).

The product of its (nonzero) digits is 40824, while the sum is 41.

The square root of 999220712 is about 31610.4525750581. The cubic root of 999220712 is about 999.7401698275.

The spelling of 999220712 in words is "nine hundred ninety-nine million, two hundred twenty thousand, seven hundred twelve".