1989134834 has 8 divisors (see below), whose sum is σ = 2987383728. Its totient is φ = 993340260.

The previous prime is 1989134831. The next prime is 1989134839. The reversal of 1989134834 is 4384319891.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (1989134831) by changing a digit.

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, 611552 + ... + 614795.

It is an arithmetic number, because the mean of its divisors is an integer number (373422966).

Almost surely, 2^1989134834 is an apocalyptic number.

1989134834 is a deficient number, since it is larger than the sum of its proper divisors (998248894).

1989134834 is a wasteful number, since it uses less digits than its factorization.

1989134834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1227160.

The product of its digits is 746496, while the sum is 50.

The square root of 1989134834 is about 44599.7178690628. The cubic root of 1989134834 is about 1257.6353639325.

The spelling of 1989134834 in words is "one billion, nine hundred eighty-nine million, one hundred thirty-four thousand, eight hundred thirty-four".