1998195652 has 6 divisors (see below), whose sum is σ = 3496842398. Its totient is φ = 999097824.

The previous prime is 1998195637. The next prime is 1998195653. The reversal of 1998195652 is 2565918991.

It can be written as a sum of positive squares in only one way, i.e., 1980606016 + 17589636 = 44504^2 + 4194^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1998195593 and 1998195602.

It is not an unprimeable number, because it can be changed into a prime (1998195653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 249774453 + ... + 249774460.

Almost surely, 2^1998195652 is an apocalyptic number.

It is an amenable number.

1998195652 is a deficient number, since it is larger than the sum of its proper divisors (1498646746).

1998195652 is a wasteful number, since it uses less digits than its factorization.

1998195652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 499548917 (or 499548915 counting only the distinct ones).

The product of its digits is 1749600, while the sum is 55.

The square root of 1998195652 is about 44701.1817740874. The cubic root of 1998195652 is about 1259.5420465586.

The spelling of 1998195652 in words is "one billion, nine hundred ninety-eight million, one hundred ninety-five thousand, six hundred fifty-two".