4443681 has 24 divisors (see below), whose sum is σ = 6921504. Its totient is φ = 2506240.

The previous prime is 4443653. The next prime is 4443689. The reversal of 4443681 is 1863444.

It is not a de Polignac number, because 4443681 - 2⁷ = 4443553 is a prime.

It is a super-2 number, since 2×4443681² = 39492601659522, which contains 22 as substring.

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 a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4443689) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 49885 + ... + 49973.

It is an arithmetic number, because the mean of its divisors is an integer number (288396).

Almost surely, 2^4443681 is an apocalyptic number.

It is an amenable number.

4443681 is a deficient number, since it is larger than the sum of its proper divisors (2477823).

4443681 is a wasteful number, since it uses less digits than its factorization.

4443681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209 (or 120 counting only the distinct ones).

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

The square root of 4443681 is about 2108.0040322542. The cubic root of 4443681 is about 164.4047236701.

The spelling of 4443681 in words is "four million, four hundred forty-three thousand, six hundred eighty-one".