3640389 has 8 divisors (see below), whose sum is σ = 4864992. Its totient is φ = 2421360.

The previous prime is 3640379. The next prime is 3640391. The reversal of 3640389 is 9830463.

3640389 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3640389 - 2¹⁶ = 3574853 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3640309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 502 + ... + 2744.

It is an arithmetic number, because the mean of its divisors is an integer number (608124).

Almost surely, 2^3640389 is an apocalyptic number.

It is an amenable number.

3640389 is a deficient number, since it is larger than the sum of its proper divisors (1224603).

3640389 is a wasteful number, since it uses less digits than its factorization.

3640389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2787.

The product of its (nonzero) digits is 15552, while the sum is 33.

The square root of 3640389 is about 1907.9803458107. The cubic root of 3640389 is about 153.8329131746.

The spelling of 3640389 in words is "three million, six hundred forty thousand, three hundred eighty-nine".