1998247320 has 448 divisors, whose sum is σ = 7436772000. Its totient is φ = 480743424.

The previous prime is 1998247319. The next prime is 1998247369. The reversal of 1998247320 is 237428991.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

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 111 ways as a sum of consecutive naturals, for example, 14375811 + ... + 14375949.

Almost surely, 2^1998247320 is an apocalyptic number.

1998247320 is a gapful number since it is divisible by the number (10) 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 1998247320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3718386000).

1998247320 is an abundant number, since it is smaller than the sum of its proper divisors (5438524680).

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

1998247320 is a wasteful number, since it uses less digits than its factorization.

1998247320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214 (or 195 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The square root of 1998247320 is about 44701.7596969068. The cubic root of 1998247320 is about 1259.5529025956.

The spelling of 1998247320 in words is "one billion, nine hundred ninety-eight million, two hundred forty-seven thousand, three hundred twenty".