1989662632 has 16 divisors (see below), whose sum is σ = 3817376640. Its totient is φ = 971695536.

The previous prime is 1989662627. The next prime is 1989662641. The reversal of 1989662632 is 2362669891.

It is a self number, because there is not a number n which added to its sum of digits gives 1989662632.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2891608 + ... + 2892295.

It is an arithmetic number, because the mean of its divisors is an integer number (238586040).

Almost surely, 2^1989662632 is an apocalyptic number.

It is an amenable number.

1989662632 is a deficient number, since it is larger than the sum of its proper divisors (1827714008).

1989662632 is a wasteful number, since it uses less digits than its factorization.

1989662632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5783952 (or 5783948 counting only the distinct ones).

The product of its digits is 1679616, while the sum is 52.

The square root of 1989662632 is about 44605.6345319736. The cubic root of 1989662632 is about 1257.7465879545.

It can be divided in two parts, 19896 and 62632, that added together give a palindrome (82528).

The spelling of 1989662632 in words is "one billion, nine hundred eighty-nine million, six hundred sixty-two thousand, six hundred thirty-two".