1822989 has 16 divisors (see below), whose sum is σ = 2838528. Its totient is φ = 1018992.

The previous prime is 1822981. The next prime is 1822999. The reversal of 1822989 is 9892281.

It is not a de Polignac number, because 1822989 - 2³ = 1822981 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1822981) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 64 + ... + 1910.

It is an arithmetic number, because the mean of its divisors is an integer number (177408).

2^1822989 is an apocalyptic number.

It is an amenable number.

1822989 is a deficient number, since it is larger than the sum of its proper divisors (1015539).

1822989 is a wasteful number, since it uses less digits than its factorization.

1822989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1904.

The product of its digits is 20736, while the sum is 39.

The square root of 1822989 is about 1350.1810989641. The cubic root of 1822989 is about 122.1597164630.

The spelling of 1822989 in words is "one million, eight hundred twenty-two thousand, nine hundred eighty-nine".