3644718 has 80 divisors (see below), whose sum is σ = 9680256. Its totient is φ = 905520.

The previous prime is 3644699. The next prime is 3644731. The reversal of 3644718 is 8174463.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 158455 + ... + 158477.

Almost surely, 2^3644718 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3644718, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4840128).

3644718 is an abundant number, since it is smaller than the sum of its proper divisors (6035538).

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

3644718 is a wasteful number, since it uses less digits than its factorization.

3644718 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67 (or 46 counting only the distinct ones).

The product of its digits is 16128, while the sum is 33.

The square root of 3644718 is about 1909.1144544003. The cubic root of 3644718 is about 153.8938662655.

The spelling of 3644718 in words is "three million, six hundred forty-four thousand, seven hundred eighteen".