1989964382 has 24 divisors (see below), whose sum is σ = 3485144160. Its totient is φ = 849683520.

The previous prime is 1989964381. The next prime is 1989964423. The reversal of 1989964382 is 2834699891.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1989964381) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10907 + ... + 64022.

It is an arithmetic number, because the mean of its divisors is an integer number (145214340).

Almost surely, 2^1989964382 is an apocalyptic number.

1989964382 is a deficient number, since it is larger than the sum of its proper divisors (1495179778).

1989964382 is a wasteful number, since it uses less digits than its factorization.

1989964382 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75216 (or 75209 counting only the distinct ones).

The product of its digits is 6718464, while the sum is 59.

The square root of 1989964382 is about 44609.0168239561. The cubic root of 1989964382 is about 1257.8101675521.

The spelling of 1989964382 in words is "one billion, nine hundred eighty-nine million, nine hundred sixty-four thousand, three hundred eighty-two".