1998249792 has 168 divisors, whose sum is σ = 6709684320. Its totient is φ = 518999040.

The previous prime is 1998249769. The next prime is 1998249797. The reversal of 1998249792 is 2979428991.

It is a tau number, because it is divible by the number of its divisors (168).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1998249797) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 93834 + ... + 113142.

Almost surely, 2^1998249792 is an apocalyptic number.

1998249792 is a gapful number since it is divisible by the number (12) 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 1998249792, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3354842160).

1998249792 is an abundant number, since it is smaller than the sum of its proper divisors (4711434528).

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

1998249792 is a wasteful number, since it uses less digits than its factorization.

1998249792 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19349 (or 19332 counting only the distinct ones).

The product of its digits is 5878656, while the sum is 60.

The square root of 1998249792 is about 44701.7873468165. The cubic root of 1998249792 is about 1259.5534219863.

The spelling of 1998249792 in words is "one billion, nine hundred ninety-eight million, two hundred forty-nine thousand, seven hundred ninety-two".