2609649 has 24 divisors (see below), whose sum is σ = 4497792. Its totient is φ = 1425600.

The previous prime is 2609639. The next prime is 2609657. The reversal of 2609649 is 9469062.

2609649 is a `hidden beast` number, since 2 + 6 + 0 + 9 + 649 = 666.

It is not a de Polignac number, because 2609649 - 2⁷ = 2609521 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2609639) 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 23 ways as a sum of consecutive naturals, for example, 549 + ... + 2349.

It is an arithmetic number, because the mean of its divisors is an integer number (187408).

2^2609649 is an apocalyptic number.

It is an amenable number.

2609649 is a deficient number, since it is larger than the sum of its proper divisors (1888143).

2609649 is a wasteful number, since it uses less digits than its factorization.

2609649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1837 (or 1834 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 2609649 is about 1615.4408067150. The cubic root of 2609649 is about 137.6767797845.

The spelling of 2609649 in words is "two million, six hundred nine thousand, six hundred forty-nine".