4000863 has 4 divisors (see below), whose sum is σ = 5334488. Its totient is φ = 2667240.

The previous prime is 4000861. The next prime is 4000879. The reversal of 4000863 is 3680004.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 4000863 - 2¹ = 4000861 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4000861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 666808 + ... + 666813.

It is an arithmetic number, because the mean of its divisors is an integer number (1333622).

Almost surely, 2^4000863 is an apocalyptic number.

4000863 is a deficient number, since it is larger than the sum of its proper divisors (1333625).

4000863 is a wasteful number, since it uses less digits than its factorization.

4000863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1333624.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 4000863 is about 2000.2157383642. The cubic root of 4000863 is about 158.7515204351.

Adding to 4000863 its reverse (3680004), we get a palindrome (7680867).

The spelling of 4000863 in words is "four million, eight hundred sixty-three", and thus it is an aban number.