1989132512 has 24 divisors (see below), whose sum is σ = 3917319336. Its totient is φ = 994257792.

The previous prime is 1989132511. The next prime is 1989132517. The reversal of 1989132512 is 2152319891.

It is a self number, because there is not a number n which added to its sum of digits gives 1989132512.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1989132511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 123383 + ... + 138569.

It is an arithmetic number, because the mean of its divisors is an integer number (163221639).

Almost surely, 2^1989132512 is an apocalyptic number.

It is an amenable number.

1989132512 is a deficient number, since it is larger than the sum of its proper divisors (1928186824).

1989132512 is a wasteful number, since it uses less digits than its factorization.

1989132512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19290 (or 19282 counting only the distinct ones).

The product of its digits is 38880, while the sum is 41.

The square root of 1989132512 is about 44599.6918375004. The cubic root of 1989132512 is about 1257.6348745689.

The spelling of 1989132512 in words is "one billion, nine hundred eighty-nine million, one hundred thirty-two thousand, five hundred twelve".