3649655 has 4 divisors (see below), whose sum is σ = 4379592. Its totient is φ = 2919720.

The previous prime is 3649637. The next prime is 3649669. The reversal of 3649655 is 5569463.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 3649655 - 2¹² = 3645559 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 364961 + ... + 364970.

It is an arithmetic number, because the mean of its divisors is an integer number (1094898).

Almost surely, 2^3649655 is an apocalyptic number.

3649655 is a deficient number, since it is larger than the sum of its proper divisors (729937).

3649655 is an equidigital number, since it uses as much as digits as its factorization.

3649655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 729936.

The product of its digits is 97200, while the sum is 38.

The square root of 3649655 is about 1910.4070246940. The cubic root of 3649655 is about 153.9633212249.

The spelling of 3649655 in words is "three million, six hundred forty-nine thousand, six hundred fifty-five".