1989458 has 8 divisors (see below), whose sum is σ = 3087180. Its totient is φ = 960400.

The previous prime is 1989419. The next prime is 1989479. The reversal of 1989458 is 8549891.

It can be written as a sum of positive squares in 2 ways, for example, as 1885129 + 104329 = 1373^2 + 323^2 .

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

It is a Curzon 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, 17093 + ... + 17208.

2^1989458 is an apocalyptic number.

1989458 is a deficient number, since it is larger than the sum of its proper divisors (1097722).

1989458 is a wasteful number, since it uses less digits than its factorization.

1989458 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34332.

The product of its digits is 103680, while the sum is 44.

The square root of 1989458 is about 1410.4814780776. The cubic root of 1989458 is about 125.7703467742.

The spelling of 1989458 in words is "one million, nine hundred eighty-nine thousand, four hundred fifty-eight".