1998964224 has 160 divisors (see below), whose sum is σ = 6175319040. Its totient is φ = 637249536.

The previous prime is 1998964199. The next prime is 1998964243. The reversal of 1998964224 is 4224698991.

It is a Harshad number since it is a multiple of its sum of digits (54).

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 314809 + ... + 321095.

It is an arithmetic number, because the mean of its divisors is an integer number (38595744).

Almost surely, 2^1998964224 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 1998964224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3087659520).

1998964224 is an abundant number, since it is smaller than the sum of its proper divisors (4176354816).

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

1998964224 is an equidigital number, since it uses as much as digits as its factorization.

1998964224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6337 (or 6315 counting only the distinct ones).

The product of its digits is 2239488, while the sum is 54.

The square root of 1998964224 is about 44709.7777225519. Note that the first 4 decimals coincide. The cubic root of 1998964224 is about 1259.7035130064.

The spelling of 1998964224 in words is "one billion, nine hundred ninety-eight million, nine hundred sixty-four thousand, two hundred twenty-four".