1980830998 has 4 divisors (see below), whose sum is σ = 2971246500. Its totient is φ = 990415498.

The previous prime is 1980830981. The next prime is 1980831011. The reversal of 1980830998 is 8990380891.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 495207748 + ... + 495207751.

It is an arithmetic number, because the mean of its divisors is an integer number (742811625).

Almost surely, 2^1980830998 is an apocalyptic number.

1980830998 is a deficient number, since it is larger than the sum of its proper divisors (990415502).

1980830998 is an equidigital number, since it uses as much as digits as its factorization.

1980830998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 990415501.

The product of its (nonzero) digits is 1119744, while the sum is 55.

The square root of 1980830998 is about 44506.5275886583. The cubic root of 1980830998 is about 1255.8828828245.

The spelling of 1980830998 in words is "one billion, nine hundred eighty million, eight hundred thirty thousand, nine hundred ninety-eight".