4381644 has 12 divisors (see below), whose sum is σ = 10223864. Its totient is φ = 1460544.

The previous prime is 4381607. The next prime is 4381667. The reversal of 4381644 is 4461834.

It is a tau number, because it is divible by the number of its divisors (12).

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 182557 + ... + 182580.

Almost surely, 2^4381644 is an apocalyptic number.

It is an amenable number.

4381644 is an abundant number, since it is smaller than the sum of its proper divisors (5842220).

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

4381644 is a wasteful number, since it uses less digits than its factorization.

4381644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 365144 (or 365142 counting only the distinct ones).

The product of its digits is 9216, while the sum is 30.

The square root of 4381644 is about 2093.2376835897. The cubic root of 4381644 is about 163.6360658805.

The spelling of 4381644 in words is "four million, three hundred eighty-one thousand, six hundred forty-four".