4443887861 has 12 divisors (see below), whose sum is σ = 5210131968. Its totient is φ = 3779048952.

The previous prime is 4443887857. The next prime is 4443887863. The reversal of 4443887861 is 1687883444.

It is not a de Polignac number, because 4443887861 - 2² = 4443887857 is a prime.

It is a super-2 number, since 2×4443887861² = 39496278642286310642, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4443887863) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 350831 + ... + 363276.

It is an arithmetic number, because the mean of its divisors is an integer number (434177664).

Almost surely, 2^4443887861 is an apocalyptic number.

It is an amenable number.

4443887861 is a deficient number, since it is larger than the sum of its proper divisors (766244107).

4443887861 is a wasteful number, since it uses less digits than its factorization.

4443887861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 714248 (or 714241 counting only the distinct ones).

The product of its digits is 4128768, while the sum is 53.

The square root of 4443887861 is about 66662.4921601345. The cubic root of 4443887861 is about 1644.0727473812.

The spelling of 4443887861 in words is "four billion, four hundred forty-three million, eight hundred eighty-seven thousand, eight hundred sixty-one".