4406643988 has 12 divisors (see below), whose sum is σ = 7712927712. Its totient is φ = 2202950360.

The previous prime is 4406643977. The next prime is 4406644013. The reversal of 4406643988 is 8893466044.

It is a happy number.

It is a super-2 number, since 2×4406643988² = 38837022473953088288, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65320 + ... + 114367.

It is an arithmetic number, because the mean of its divisors is an integer number (642743976).

Almost surely, 2^4406643988 is an apocalyptic number.

It is an amenable number.

4406643988 is a deficient number, since it is larger than the sum of its proper divisors (3306283724).

4406643988 is a wasteful number, since it uses less digits than its factorization.

4406643988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185822 (or 185820 counting only the distinct ones).

The product of its (nonzero) digits is 3981312, while the sum is 52.

The square root of 4406643988 is about 66382.5578597270. The cubic root of 4406643988 is about 1639.4669083324.

The spelling of 4406643988 in words is "four billion, four hundred six million, six hundred forty-three thousand, nine hundred eighty-eight".