4001986895 has 8 divisors (see below), whose sum is σ = 4804813104. Its totient is φ = 3199970304.

The previous prime is 4001986889. The next prime is 4001986897. The reversal of 4001986895 is 5986891004.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4001986895 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4001986897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 191474 + ... + 211343.

It is an arithmetic number, because the mean of its divisors is an integer number (600601638).

Almost surely, 2^4001986895 is an apocalyptic number.

4001986895 is a deficient number, since it is larger than the sum of its proper divisors (802826209).

4001986895 is a wasteful number, since it uses less digits than its factorization.

4001986895 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 404809.

The product of its (nonzero) digits is 622080, while the sum is 50.

The square root of 4001986895 is about 63261.2590374235. The cubic root of 4001986895 is about 1587.6638417295.

The spelling of 4001986895 in words is "four billion, one million, nine hundred eighty-six thousand, eight hundred ninety-five".