3649205 has 16 divisors (see below), whose sum is σ = 5128704. Its totient is φ = 2440320.

The previous prime is 3649201. The next prime is 3649207. The reversal of 3649205 is 5029463.

It is not a de Polignac number, because 3649205 - 2² = 3649201 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3649201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 164 + ... + 2706.

It is an arithmetic number, because the mean of its divisors is an integer number (320544).

Almost surely, 2^3649205 is an apocalyptic number.

3649205 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

3649205 is a deficient number, since it is larger than the sum of its proper divisors (1479499).

3649205 is a wasteful number, since it uses less digits than its factorization.

3649205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2596.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 3649205 is about 1910.2892451145. The cubic root of 3649205 is about 153.9569931069.

The spelling of 3649205 in words is "three million, six hundred forty-nine thousand, two hundred five".