1889489 has 6 divisors (see below), whose sum is σ = 2198034. Its totient is φ = 1619520.

The previous prime is 1889483. The next prime is 1889491. The reversal of 1889489 is 9849881.

It can be written as a sum of positive squares in only one way, i.e., 1399489 + 490000 = 1183^2 + 700^2 .

It is not a de Polignac number, because 1889489 - 2¹² = 1885393 is a prime.

It is a super-2 number, since 2×1889489² = 7140337362242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1889483) 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 5 ways as a sum of consecutive naturals, for example, 19232 + ... + 19329.

It is an arithmetic number, because the mean of its divisors is an integer number (366339).

2^1889489 is an apocalyptic number.

It is an amenable number.

1889489 is a deficient number, since it is larger than the sum of its proper divisors (308545).

1889489 is an equidigital number, since it uses as much as digits as its factorization.

1889489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38575 (or 38568 counting only the distinct ones).

The product of its digits is 165888, while the sum is 47.

The square root of 1889489 is about 1374.5868470199. The cubic root of 1889489 is about 123.6274152556.

The spelling of 1889489 in words is "one million, eight hundred eighty-nine thousand, four hundred eighty-nine".