1998742532 has 12 divisors (see below), whose sum is σ = 3498942720. Its totient is φ = 999044616.

The previous prime is 1998742523. The next prime is 1998742541. The reversal of 1998742532 is 2352478991.

It is an interprime number because it is at equal distance from previous prime (1998742523) and next prime (1998742541).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67628 + ... + 92579.

It is an arithmetic number, because the mean of its divisors is an integer number (291578560).

Almost surely, 2^1998742532 is an apocalyptic number.

It is an amenable number.

1998742532 is a deficient number, since it is larger than the sum of its proper divisors (1500200188).

1998742532 is a wasteful number, since it uses less digits than its factorization.

1998742532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163330 (or 163328 counting only the distinct ones).

The product of its digits is 1088640, while the sum is 50.

The square root of 1998742532 is about 44707.2984198330. The cubic root of 1998742532 is about 1259.6569428023.

The spelling of 1998742532 in words is "one billion, nine hundred ninety-eight million, seven hundred forty-two thousand, five hundred thirty-two".