2805490 has 8 divisors (see below), whose sum is σ = 5049900. Its totient is φ = 1122192.

The previous prime is 2805487. The next prime is 2805497. The reversal of 2805490 is 945082.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 2798929 + 6561 = 1673^2 + 81^2 .

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

It is not an unprimeable number, because it can be changed into a prime (2805497) 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, 140265 + ... + 140284.

2^2805490 is an apocalyptic number.

2805490 is a deficient number, since it is larger than the sum of its proper divisors (2244410).

2805490 is a wasteful number, since it uses less digits than its factorization.

2805490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280556.

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

The square root of 2805490 is about 1674.9597010078. The cubic root of 2805490 is about 141.0380327629.

The spelling of 2805490 in words is "two million, eight hundred five thousand, four hundred ninety".