4009644 has 36 divisors (see below), whose sum is σ = 10226944. Its totient is φ = 1324512.

The previous prime is 4009639. The next prime is 4009667. The reversal of 4009644 is 4469004.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-3 number, since 3×4009644³ (a number of 21 digits) contains 333 as substring.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 4134 + ... + 5010.

Almost surely, 2^4009644 is an apocalyptic number.

It is an amenable number.

4009644 is an abundant number, since it is smaller than the sum of its proper divisors (6217300).

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

4009644 is a wasteful number, since it uses less digits than its factorization.

4009644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1014 (or 1009 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 4009644 is about 2002.4095485190. The cubic root of 4009644 is about 158.8675769381.

The spelling of 4009644 in words is "four million, nine thousand, six hundred forty-four".