999212396 has 48 divisors (see below), whose sum is σ = 2160029760. Its totient is φ = 393845760.

The previous prime is 999212387. The next prime is 999212419. The reversal of 999212396 is 693212999.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 97400 + ... + 107168.

It is an arithmetic number, because the mean of its divisors is an integer number (45000620).

Almost surely, 2^999212396 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 999212396, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1080014880).

999212396 is an abundant number, since it is smaller than the sum of its proper divisors (1160817364).

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

999212396 is a wasteful number, since it uses less digits than its factorization.

999212396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10074 (or 10072 counting only the distinct ones).

The product of its digits is 472392, while the sum is 50.

The square root of 999212396 is about 31610.3210360161. The cubic root of 999212396 is about 999.7373963787.

The spelling of 999212396 in words is "nine hundred ninety-nine million, two hundred twelve thousand, three hundred ninety-six".