3649789 has 8 divisors (see below), whose sum is σ = 4288032. Its totient is φ = 3062640.

The previous prime is 3649777. The next prime is 3649831. The reversal of 3649789 is 9879463.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3649789 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3649889) 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, 12619 + ... + 12904.

It is an arithmetic number, because the mean of its divisors is an integer number (536004).

Almost surely, 2^3649789 is an apocalyptic number.

It is an amenable number.

3649789 is a deficient number, since it is larger than the sum of its proper divisors (638243).

3649789 is a wasteful number, since it uses less digits than its factorization.

3649789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25547.

The product of its digits is 326592, while the sum is 46.

The square root of 3649789 is about 1910.4420954324. The cubic root of 3649789 is about 153.9652054973.

It can be divided in two parts, 364 and 9789, that added together give a triangular number (10153 = T₁₄₂).

The spelling of 3649789 in words is "three million, six hundred forty-nine thousand, seven hundred eighty-nine".