1989530225 has 18 divisors (see below), whose sum is σ = 2478398850. Its totient is φ = 1584307200.

The previous prime is 1989530201. The next prime is 1989530251. The reversal of 1989530225 is 5220359891.

It can be written as a sum of positive squares in 9 ways, for example, as 1721586064 + 267944161 = 41492^2 + 16369^2 .

It is not a de Polignac number, because 1989530225 - 2¹² = 1989526129 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 4430801 + ... + 4431249.

It is an arithmetic number, because the mean of its divisors is an integer number (137688825).

Almost surely, 2^1989530225 is an apocalyptic number.

It is an amenable number.

1989530225 is a deficient number, since it is larger than the sum of its proper divisors (488868625).

1989530225 is an frugal number, since it uses more digits than its factorization.

1989530225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1301 (or 875 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 44.

The square root of 1989530225 is about 44604.1503113780. The cubic root of 1989530225 is about 1257.7186873875.

The spelling of 1989530225 in words is "one billion, nine hundred eighty-nine million, five hundred thirty thousand, two hundred twenty-five".