1989934115 has 16 divisors (see below), whose sum is σ = 2573436096. Its totient is φ = 1468444800.

The previous prime is 1989934097. The next prime is 1989934127. The reversal of 1989934115 is 5114399891.

It is a de Polignac number, because none of the positive numbers 2^k-1989934115 is a prime.

It is a Duffinian number.

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 15 ways as a sum of consecutive naturals, for example, 88085 + ... + 108345.

It is an arithmetic number, because the mean of its divisors is an integer number (160839756).

Almost surely, 2^1989934115 is an apocalyptic number.

1989934115 is a deficient number, since it is larger than the sum of its proper divisors (583501981).

1989934115 is a wasteful number, since it uses less digits than its factorization.

1989934115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21790.

The product of its digits is 349920, while the sum is 50.

The square root of 1989934115 is about 44608.6775751086. The cubic root of 1989934115 is about 1257.8037904977.

The spelling of 1989934115 in words is "one billion, nine hundred eighty-nine million, nine hundred thirty-four thousand, one hundred fifteen".