1919998 has 8 divisors (see below), whose sum is σ = 2886408. Its totient is φ = 957864.

The previous prime is 1919987. The next prime is 1920001. The reversal of 1919998 is 8999191.

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 polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 540 + ... + 2032.

It is an arithmetic number, because the mean of its divisors is an integer number (360801).

2^1919998 is an apocalyptic number.

1919998 is a deficient number, since it is larger than the sum of its proper divisors (966410).

1919998 is a wasteful number, since it uses less digits than its factorization.

1919998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2138.

The product of its digits is 52488, while the sum is 46.

The square root of 1919998 is about 1385.6399243671. The cubic root of 1919998 is about 124.2892570821.

The spelling of 1919998 in words is "one million, nine hundred nineteen thousand, nine hundred ninety-eight".