996623299728 has 320 divisors, whose sum is σ = 3465023224320. Its totient is φ = 267739250688.

The previous prime is 996623299681. The next prime is 996623299751. The reversal of 996623299728 is 827992326699.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 56180076 + ... + 56197812.

It is an arithmetic number, because the mean of its divisors is an integer number (10828197576).

Almost surely, 2^996623299728 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 996623299728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1732511612160).

996623299728 is an abundant number, since it is smaller than the sum of its proper divisors (2468399924592).

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

996623299728 is a wasteful number, since it uses less digits than its factorization.

996623299728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18871 (or 18859 counting only the distinct ones).

The product of its digits is 317447424, while the sum is 72.

The spelling of 996623299728 in words is "nine hundred ninety-six billion, six hundred twenty-three million, two hundred ninety-nine thousand, seven hundred twenty-eight".