994643712 has 216 divisors, whose sum is σ = 3035585280. Its totient is φ = 324725760.

The previous prime is 994643687. The next prime is 994643719. The reversal of 994643712 is 217346499.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (216).

It is a super-2 number, since 2×994643712² = 1978632227642277888, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (994643719) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3670137 + ... + 3670407.

Almost surely, 2^994643712 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 994643712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1517792640).

994643712 is an abundant number, since it is smaller than the sum of its proper divisors (2040941568).

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

994643712 is an equidigital number, since it uses as much as digits as its factorization.

994643712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 361 (or 335 counting only the distinct ones).

The product of its digits is 326592, while the sum is 45.

The square root of 994643712 is about 31537.9725410496. The cubic root of 994643712 is about 998.2113733889.

The spelling of 994643712 in words is "nine hundred ninety-four million, six hundred forty-three thousand, seven hundred twelve".