3649966 has 8 divisors (see below), whose sum is σ = 5486040. Its totient is φ = 1821288.

The previous prime is 3649949. The next prime is 3649967. The reversal of 3649966 is 6699463.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3649967) 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, 381 + ... + 2728.

It is an arithmetic number, because the mean of its divisors is an integer number (685755).

Almost surely, 2^3649966 is an apocalyptic number.

3649966 is a deficient number, since it is larger than the sum of its proper divisors (1836074).

3649966 is a wasteful number, since it uses less digits than its factorization.

3649966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3698.

The product of its digits is 209952, while the sum is 43.

The square root of 3649966 is about 1910.4884192269. The cubic root of 3649966 is about 153.9676943535.

The spelling of 3649966 in words is "three million, six hundred forty-nine thousand, nine hundred sixty-six".