1989043814 has 8 divisors (see below), whose sum is σ = 3001431888. Its totient is φ = 988566520.

The previous prime is 1989043787. The next prime is 1989043829. The reversal of 1989043814 is 4183409891.

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

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 2977277 + ... + 2977944.

It is an arithmetic number, because the mean of its divisors is an integer number (375178986).

Almost surely, 2^1989043814 is an apocalyptic number.

1989043814 is a deficient number, since it is larger than the sum of its proper divisors (1012388074).

1989043814 is a wasteful number, since it uses less digits than its factorization.

1989043814 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5955390.

The product of its (nonzero) digits is 248832, while the sum is 47.

The square root of 1989043814 is about 44598.6974473470. The cubic root of 1989043814 is about 1257.6161811007.

The spelling of 1989043814 in words is "one billion, nine hundred eighty-nine million, forty-three thousand, eight hundred fourteen".