2840489 has 4 divisors (see below), whose sum is σ = 2845056. Its totient is φ = 2835924.

The previous prime is 2840483. The next prime is 2840507. The reversal of 2840489 is 9840482.

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: 9840482 = 2 ⋅4920241.

It is a cyclic number.

It is not a de Polignac number, because 2840489 - 2¹⁶ = 2774953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2840483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1169 + ... + 2654.

It is an arithmetic number, because the mean of its divisors is an integer number (711264).

2^2840489 is an apocalyptic number.

It is an amenable number.

2840489 is a deficient number, since it is larger than the sum of its proper divisors (4567).

2840489 is an equidigital number, since it uses as much as digits as its factorization.

2840489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4566.

The product of its (nonzero) digits is 18432, while the sum is 35.

The square root of 2840489 is about 1685.3750324483. The cubic root of 2840489 is about 141.6221023996.

The spelling of 2840489 in words is "two million, eight hundred forty thousand, four hundred eighty-nine".