1995981434 has 16 divisors (see below), whose sum is σ = 3172758120. Its totient is φ = 940074240.

The previous prime is 1995981419. The next prime is 1995981443. The reversal of 1995981434 is 4341895991.

It can be written as a sum of positive squares in 4 ways, for example, as 540330025 + 1455651409 = 23245^2 + 38153^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 417299 + ... + 422054.

Almost surely, 2^1995981434 is an apocalyptic number.

1995981434 is a deficient number, since it is larger than the sum of its proper divisors (1176776686).

1995981434 is a wasteful number, since it uses less digits than its factorization.

1995981434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 839425.

The product of its digits is 1399680, while the sum is 53.

The square root of 1995981434 is about 44676.4080248178. The cubic root of 1995981434 is about 1259.0766381057.

The spelling of 1995981434 in words is "one billion, nine hundred ninety-five million, nine hundred eighty-one thousand, four hundred thirty-four".