3649305 has 32 divisors (see below), whose sum is σ = 6749568. Its totient is φ = 1664000.

The previous prime is 3649301. The next prime is 3649307. The reversal of 3649305 is 5039463.

It is a happy number.

It is not a de Polignac number, because 3649305 - 2² = 3649301 is a prime.

It is an Ulam number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3649301) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2155 + ... + 3455.

It is an arithmetic number, because the mean of its divisors is an integer number (210924).

Almost surely, 2^3649305 is an apocalyptic number.

It is an amenable number.

3649305 is a deficient number, since it is larger than the sum of its proper divisors (3100263).

3649305 is a wasteful number, since it uses less digits than its factorization.

3649305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1337.

The product of its (nonzero) digits is 9720, while the sum is 30.

The square root of 3649305 is about 1910.3154189819. The cubic root of 3649305 is about 153.9583994003.

It can be divided in two parts, 364 and 9305, that added together give a palindrome (9669).

The spelling of 3649305 in words is "three million, six hundred forty-nine thousand, three hundred five".