3649641 has 4 divisors (see below), whose sum is σ = 4866192. Its totient is φ = 2433092.

The previous prime is 3649637. The next prime is 3649669. The reversal of 3649641 is 1469463.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3649641 - 2² = 3649637 is a prime.

It is a D-number.

3649641 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (3649601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 608271 + ... + 608276.

It is an arithmetic number, because the mean of its divisors is an integer number (1216548).

Almost surely, 2^3649641 is an apocalyptic number.

It is an amenable number.

3649641 is a deficient number, since it is larger than the sum of its proper divisors (1216551).

3649641 is a wasteful number, since it uses less digits than its factorization.

3649641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1216550.

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

The square root of 3649641 is about 1910.4033605498. The cubic root of 3649641 is about 153.9631243579.

The spelling of 3649641 in words is "three million, six hundred forty-nine thousand, six hundred forty-one".