1919989886 has 8 divisors (see below), whose sum is σ = 2880209280. Its totient is φ = 959920128.

The previous prime is 1919989849. The next prime is 1919989913. The reversal of 1919989886 is 6889899191.

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

It is a super-3 number, since 3×1919989886³ (a number of 29 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

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, 3710 + ... + 62078.

It is an arithmetic number, because the mean of its divisors is an integer number (360026160).

Almost surely, 2^1919989886 is an apocalyptic number.

1919989886 is a deficient number, since it is larger than the sum of its proper divisors (960219394).

1919989886 is a wasteful number, since it uses less digits than its factorization.

1919989886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74818.

The product of its digits is 20155392, while the sum is 68.

The square root of 1919989886 is about 43817.6891905541. The cubic root of 1919989886 is about 1242.8908199784.

The spelling of 1919989886 in words is "one billion, nine hundred nineteen million, nine hundred eighty-nine thousand, eight hundred eighty-six".