996435728 has 40 divisors (see below), whose sum is σ = 1996110336. Its totient is φ = 481363200.

The previous prime is 996435721. The next prime is 996435779. The reversal of 996435728 is 827534699.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 996435728.

It is not an unprimeable number, because it can be changed into a prime (996435721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 406988 + ... + 409428.

Almost surely, 2^996435728 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 996435728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (998055168).

996435728 is an abundant number, since it is smaller than the sum of its proper divisors (999674608).

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

996435728 is a wasteful number, since it uses less digits than its factorization.

996435728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3303 (or 3297 counting only the distinct ones).

The product of its digits is 3265920, while the sum is 53.

The square root of 996435728 is about 31566.3702062812. The cubic root of 996435728 is about 998.8104949721.

The spelling of 996435728 in words is "nine hundred ninety-six million, four hundred thirty-five thousand, seven hundred twenty-eight".