2859649 has 6 divisors (see below), whose sum is σ = 3096726. Its totient is φ = 2639520.

The previous prime is 2859641. The next prime is 2859673. The reversal of 2859649 is 9469582.

It can be written as a sum of positive squares in 3 ways, for example, as 37249 + 2822400 = 193^2 + 1680^2 .

It is not a de Polignac number, because 2859649 - 2³ = 2859641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2859641) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8292 + ... + 8629.

It is an arithmetic number, because the mean of its divisors is an integer number (516121).

2^2859649 is an apocalyptic number.

It is an amenable number.

2859649 is a deficient number, since it is larger than the sum of its proper divisors (237077).

2859649 is a wasteful number, since it uses less digits than its factorization.

2859649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16947 (or 16934 counting only the distinct ones).

The product of its digits is 155520, while the sum is 43.

The square root of 2859649 is about 1691.0496740191. The cubic root of 2859649 is about 141.9398177823.

The spelling of 2859649 in words is "two million, eight hundred fifty-nine thousand, six hundred forty-nine".