1999647232 has 160 divisors (see below), whose sum is σ = 4666844160. Its totient is φ = 846827520.

The previous prime is 1999647197. The next prime is 1999647239. The reversal of 1999647232 is 2327469991.

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 1999647232.

It is not an unprimeable number, because it can be changed into a prime (1999647239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5569869 + ... + 5570227.

It is an arithmetic number, because the mean of its divisors is an integer number (29167776).

Almost surely, 2^1999647232 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 1999647232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2333422080).

1999647232 is an abundant number, since it is smaller than the sum of its proper divisors (2667196928).

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

1999647232 is a wasteful number, since it uses less digits than its factorization.

1999647232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 454 (or 438 counting only the distinct ones).

The product of its digits is 1469664, while the sum is 52.

The square root of 1999647232 is about 44717.4153099215. The cubic root of 1999647232 is about 1259.8469689010.

The spelling of 1999647232 in words is "one billion, nine hundred ninety-nine million, six hundred forty-seven thousand, two hundred thirty-two".