1998362319 has 8 divisors (see below), whose sum is σ = 2665824000. Its totient is φ = 1331571096.

The previous prime is 1998362293. The next prime is 1998362347. The reversal of 1998362319 is 9132638991.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1998362319 - 2¹¹ = 1998360271 is a prime.

It is a super-2 number, since 2×1998362319² = 7986903915998115522, which contains 22 as substring.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1998362369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 160617 + ... + 172610.

It is an arithmetic number, because the mean of its divisors is an integer number (333228000).

Almost surely, 2^1998362319 is an apocalyptic number.

1998362319 is a deficient number, since it is larger than the sum of its proper divisors (667461681).

1998362319 is a wasteful number, since it uses less digits than its factorization.

1998362319 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 335229.

The product of its digits is 629856, while the sum is 51.

The square root of 1998362319 is about 44703.0459700455. The cubic root of 1998362319 is about 1259.5770645272.

The spelling of 1998362319 in words is "one billion, nine hundred ninety-eight million, three hundred sixty-two thousand, three hundred nineteen".