1998169532 has 6 divisors (see below), whose sum is σ = 3496796688. Its totient is φ = 999084764.

The previous prime is 1998169507. The next prime is 1998169559. The reversal of 1998169532 is 2359618991.

It is a happy number.

It is a super-2 number, since 2×1998169532² = 7985362957226198048, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 249771188 + ... + 249771195.

It is an arithmetic number, because the mean of its divisors is an integer number (582799448).

Almost surely, 2^1998169532 is an apocalyptic number.

It is an amenable number.

1998169532 is a deficient number, since it is larger than the sum of its proper divisors (1498627156).

1998169532 is a wasteful number, since it uses less digits than its factorization.

1998169532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 499542387 (or 499542385 counting only the distinct ones).

The product of its digits is 1049760, while the sum is 53.

The square root of 1998169532 is about 44700.8896108344. The cubic root of 1998169532 is about 1259.5365583770.

The spelling of 1998169532 in words is "one billion, nine hundred ninety-eight million, one hundred sixty-nine thousand, five hundred thirty-two".