1998201744 has 480 divisors, whose sum is σ = 7430635520. Its totient is φ = 502951680.

The previous prime is 1998201719. The next prime is 1998201763. The reversal of 1998201744 is 4471028991.

It is a happy number.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 1998201744.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 15733809 + ... + 15733935.

Almost surely, 2^1998201744 is an apocalyptic number.

1998201744 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1998201744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3715317760).

1998201744 is an abundant number, since it is smaller than the sum of its proper divisors (5432433776).

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

1998201744 is a wasteful number, since it uses less digits than its factorization.

1998201744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216 (or 193 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The square root of 1998201744 is about 44701.2499154106. The cubic root of 1998201744 is about 1259.5433265671.

The spelling of 1998201744 in words is "one billion, nine hundred ninety-eight million, two hundred one thousand, seven hundred forty-four".