1998729932 has 6 divisors (see below), whose sum is σ = 3497777388. Its totient is φ = 999364964.

The previous prime is 1998729883. The next prime is 1998729959. The reversal of 1998729932 is 2399278991.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 249841238 + ... + 249841245.

It is an arithmetic number, because the mean of its divisors is an integer number (582962898).

Almost surely, 2^1998729932 is an apocalyptic number.

It is an amenable number.

1998729932 is a deficient number, since it is larger than the sum of its proper divisors (1499047456).

1998729932 is a wasteful number, since it uses less digits than its factorization.

1998729932 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 499682487 (or 499682485 counting only the distinct ones).

The product of its digits is 4408992, while the sum is 59.

The square root of 1998729932 is about 44707.1575030218. The cubic root of 1998729932 is about 1259.6542958529.

The spelling of 1998729932 in words is "one billion, nine hundred ninety-eight million, seven hundred twenty-nine thousand, nine hundred thirty-two".