3640044 has 12 divisors (see below), whose sum is σ = 8493464. Its totient is φ = 1213344.

The previous prime is 3640037. The next prime is 3640061. The reversal of 3640044 is 4400463.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 3640044.

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 3 ways as a sum of consecutive naturals, for example, 151657 + ... + 151680.

Almost surely, 2^3640044 is an apocalyptic number.

It is an amenable number.

3640044 is an abundant number, since it is smaller than the sum of its proper divisors (4853420).

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

3640044 is a wasteful number, since it uses less digits than its factorization.

3640044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303344 (or 303342 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 3640044 is about 1907.8899339322. The cubic root of 3640044 is about 153.8280534346.

The spelling of 3640044 in words is "three million, six hundred forty thousand, forty-four".