4000648 has 16 divisors (see below), whose sum is σ = 7537680. Its totient is φ = 1990608.

The previous prime is 4000631. The next prime is 4000649. The reversal of 4000648 is 8460004.

It is not an unprimeable number, because it can be changed into a prime (4000649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 715 + ... + 2917.

It is an arithmetic number, because the mean of its divisors is an integer number (471105).

Almost surely, 2^4000648 is an apocalyptic number.

It is an amenable number.

4000648 is a deficient number, since it is larger than the sum of its proper divisors (3537032).

4000648 is a wasteful number, since it uses less digits than its factorization.

4000648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2436 (or 2432 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 4000648 is about 2000.1619934395. The cubic root of 4000648 is about 158.7486766997.

The spelling of 4000648 in words is "four million, six hundred forty-eight", and thus it is an aban number.