1989734698 has 8 divisors (see below), whose sum is σ = 3410973792. Its totient is φ = 852743436.

The previous prime is 1989734687. The next prime is 1989734717. The reversal of 1989734698 is 8964379891.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71061940 + ... + 71061967.

It is an arithmetic number, because the mean of its divisors is an integer number (426371724).

Almost surely, 2^1989734698 is an apocalyptic number.

1989734698 is a deficient number, since it is larger than the sum of its proper divisors (1421239094).

1989734698 is a wasteful number, since it uses less digits than its factorization.

1989734698 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142123916.

The product of its digits is 23514624, while the sum is 64.

The square root of 1989734698 is about 44606.4423374023. The cubic root of 1989734698 is about 1257.7617730533.

The spelling of 1989734698 in words is "one billion, nine hundred eighty-nine million, seven hundred thirty-four thousand, six hundred ninety-eight".