1989026 has 16 divisors (see below), whose sum is σ = 3246264. Its totient is φ = 908544.

The previous prime is 1989019. The next prime is 1989049. The reversal of 1989026 is 6209891.

It can be written as a sum of positive squares in 4 ways, for example, as 1428025 + 561001 = 1195^2 + 749^2 .

It is a super-4 number, since 4×1989026⁴ (a number of 26 digits) contains 4444 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2600 + ... + 3276.

2^1989026 is an apocalyptic number.

1989026 is a deficient number, since it is larger than the sum of its proper divisors (1257238).

1989026 is a wasteful number, since it uses less digits than its factorization.

1989026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 805.

The product of its (nonzero) digits is 7776, while the sum is 35.

The square root of 1989026 is about 1410.3283305670. The cubic root of 1989026 is about 125.7612426660.

The spelling of 1989026 in words is "one million, nine hundred eighty-nine thousand, twenty-six".