2509644 has 24 divisors (see below), whose sum is σ = 5884480. Its totient is φ = 832464.

The previous prime is 2509627. The next prime is 2509649. The reversal of 2509644 is 4469052.

It is not an unprimeable number, because it can be changed into a prime (2509649) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3027 + ... + 3765.

2^2509644 is an apocalyptic number.

It is an amenable number.

2509644 is an abundant number, since it is smaller than the sum of its proper divisors (3374836).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2509644 is a wasteful number, since it uses less digits than its factorization.

2509644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1029 (or 1027 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 2509644 is about 1584.1855951876. The cubic root of 2509644 is about 135.8951758580.

The spelling of 2509644 in words is "two million, five hundred nine thousand, six hundred forty-four".