1998291732 has 24 divisors (see below), whose sum is σ = 4718859936. Its totient is φ = 658071648.

The previous prime is 1998291703. The next prime is 1998291749. The reversal of 1998291732 is 2371928991.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1002163 + ... + 1004154.

It is an arithmetic number, because the mean of its divisors is an integer number (196619164).

Almost surely, 2^1998291732 is an apocalyptic number.

1998291732 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1998291732 is an abundant number, since it is smaller than the sum of its proper divisors (2720568204).

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

1998291732 is a wasteful number, since it uses less digits than its factorization.

1998291732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2006407 (or 2006405 counting only the distinct ones).

The product of its digits is 489888, while the sum is 51.

The square root of 1998291732 is about 44702.2564531143. The cubic root of 1998291732 is about 1259.5622339145.

The spelling of 1998291732 in words is "one billion, nine hundred ninety-eight million, two hundred ninety-one thousand, seven hundred thirty-two".