1989239752 has 32 divisors (see below), whose sum is σ = 3838816800. Its totient is φ = 965962624.

The previous prime is 1989239737. The next prime is 1989239771. The reversal of 1989239752 is 2579329891.

It is a junction number, because it is equal to n+sod(n) for n = 1989239693 and 1989239702.

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, 13788 + ... + 64564.

It is an arithmetic number, because the mean of its divisors is an integer number (119963025).

Almost surely, 2^1989239752 is an apocalyptic number.

It is an amenable number.

1989239752 is a deficient number, since it is larger than the sum of its proper divisors (1849577048).

1989239752 is a wasteful number, since it uses less digits than its factorization.

1989239752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50925 (or 50921 counting only the distinct ones).

The product of its digits is 2449440, while the sum is 55.

The square root of 1989239752 is about 44600.8940717560. The cubic root of 1989239752 is about 1257.6574750978.

The spelling of 1989239752 in words is "one billion, nine hundred eighty-nine million, two hundred thirty-nine thousand, seven hundred fifty-two".