3644946 has 16 divisors (see below), whose sum is σ = 8100000. Its totient is φ = 1214964.

The previous prime is 3644899. The next prime is 3644947. The reversal of 3644946 is 6494463.

3644946 is a `hidden beast` number, since 3 + 644 + 9 + 4 + 6 = 666.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 3644946.

It is not an unprimeable number, because it can be changed into a prime (3644947) 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, 33696 + ... + 33803.

It is an arithmetic number, because the mean of its divisors is an integer number (506250).

Almost surely, 2^3644946 is an apocalyptic number.

3644946 is an abundant number, since it is smaller than the sum of its proper divisors (4455054).

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

3644946 is a wasteful number, since it uses less digits than its factorization.

3644946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67510 (or 67504 counting only the distinct ones).

The product of its digits is 62208, while the sum is 36.

The square root of 3644946 is about 1909.1741670157. The cubic root of 3644946 is about 153.8970752078.

The spelling of 3644946 in words is "three million, six hundred forty-four thousand, nine hundred forty-six".