3643976 has 16 divisors (see below), whose sum is σ = 7808640. Its totient is φ = 1561680.

The previous prime is 3643973. The next prime is 3644021. The reversal of 3643976 is 6793463.

It is a happy number.

3643976 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×3643976² = 26557122177152, which contains 22 as substring.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (3643973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32480 + ... + 32591.

It is an arithmetic number, because the mean of its divisors is an integer number (488040).

Almost surely, 2^3643976 is an apocalyptic number.

It is an amenable number.

3643976 is an abundant number, since it is smaller than the sum of its proper divisors (4164664).

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

3643976 is a wasteful number, since it uses less digits than its factorization.

3643976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65084 (or 65080 counting only the distinct ones).

The product of its digits is 81648, while the sum is 38.

The square root of 3643976 is about 1908.9201135721. The cubic root of 3643976 is about 153.8834222020.

The spelling of 3643976 in words is "three million, six hundred forty-three thousand, nine hundred seventy-six".