3649566 has 16 divisors (see below), whose sum is σ = 7318800. Its totient is φ = 1213248.

The previous prime is 3649559. The next prime is 3649567. The reversal of 3649566 is 6659463.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3649567) 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, 2880 + ... + 3948.

It is an arithmetic number, because the mean of its divisors is an integer number (457425).

Almost surely, 2^3649566 is an apocalyptic number.

3649566 is an abundant number, since it is smaller than the sum of its proper divisors (3669234).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3649566 is a wasteful number, since it uses less digits than its factorization.

3649566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1643.

The product of its digits is 116640, while the sum is 39.

The square root of 3649566 is about 1910.3837310865. The cubic root of 3649566 is about 153.9620697050.

The spelling of 3649566 in words is "three million, six hundred forty-nine thousand, five hundred sixty-six".