2840905 has 8 divisors (see below), whose sum is σ = 3425472. Its totient is φ = 2261808.

The previous prime is 2840857. The next prime is 2840911. The reversal of 2840905 is 5090482.

It is a happy number.

2840905 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2840905 - 2⁷ = 2840777 is a prime.

It is a Duffinian 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, 117 + ... + 2386.

It is an arithmetic number, because the mean of its divisors is an integer number (428184).

2^2840905 is an apocalyptic number.

It is an amenable number.

2840905 is a deficient number, since it is larger than the sum of its proper divisors (584567).

2840905 is a wasteful number, since it uses less digits than its factorization.

2840905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2735.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 2840905 is about 1685.4984425979. The cubic root of 2840905 is about 141.6290157537.

The spelling of 2840905 in words is "two million, eight hundred forty thousand, nine hundred five".