1840089 has 4 divisors (see below), whose sum is σ = 2453456. Its totient is φ = 1226724.

The previous prime is 1840087. The next prime is 1840109. The reversal of 1840089 is 9800481.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9800481 = 3 ⋅3266827.

It is not a de Polignac number, because 1840089 - 2¹ = 1840087 is a prime.

It is a D-number.

It is a Duffinian number.

1840089 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1840087) 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 3 ways as a sum of consecutive naturals, for example, 306679 + ... + 306684.

It is an arithmetic number, because the mean of its divisors is an integer number (613364).

2^1840089 is an apocalyptic number.

It is an amenable number.

1840089 is a deficient number, since it is larger than the sum of its proper divisors (613367).

1840089 is an equidigital number, since it uses as much as digits as its factorization.

1840089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 613366.

The product of its (nonzero) digits is 2304, while the sum is 30.

The square root of 1840089 is about 1356.4988020636. The cubic root of 1840089 is about 122.5404891843.

The spelling of 1840089 in words is "one million, eight hundred forty thousand, eighty-nine".