1998362331 has 24 divisors (see below), whose sum is σ = 3405302784. Its totient is φ = 1105084080.

The previous prime is 1998362293. The next prime is 1998362347. The reversal of 1998362331 is 1332638991.

1998362331 is a `hidden beast` number, since 19 + 9 + 8 + 3 + 623 + 3 + 1 = 666.

It is not a de Polignac number, because 1998362331 - 2⁷ = 1998362203 is a prime.

It is a super-2 number, since 2×1998362331² = 7986904011919507122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1998362231) 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 23 ways as a sum of consecutive naturals, for example, 509661 + ... + 513566.

It is an arithmetic number, because the mean of its divisors is an integer number (141887616).

Almost surely, 2^1998362331 is an apocalyptic number.

1998362331 is a deficient number, since it is larger than the sum of its proper divisors (1406940453).

1998362331 is a wasteful number, since it uses less digits than its factorization.

1998362331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1023271 (or 1023268 counting only the distinct ones).

The product of its digits is 209952, while the sum is 45.

The square root of 1998362331 is about 44703.0461042645. The cubic root of 1998362331 is about 1259.5770670485.

The spelling of 1998362331 in words is "one billion, nine hundred ninety-eight million, three hundred sixty-two thousand, three hundred thirty-one".